Chapter 3: Through the Dark Forest

Applying Guy Sclanders’ Methodology

Session Overview

The party travels through the Teutoburg Forest toward the sacred grove where the spear can be destroyed. The forest is ancient, hostile, and alive with old power. The spear whispers louder here. Someone in their group is no longer entirely themselves.

Level: 5 → Advance to 6 at session end Duration: 3–4 hours Key Goal: Reach the sacred grove; navigate the spear’s growing influence on the party Theme: Fate vs. Free Will (the spear’s pull vs. the choice to destroy it)

Guy Sclanders’ Principles Applied

Pressure Cooker: The party is hunted (by Rome, or at least by the Legate), carrying a corrupting artifact, in enemy territory, and someone among them may be under the spear’s influence. Every hour counts.

Sacrifice Principle: The grove demands something real. This isn’t solved by clever play — it costs something.

Three Clue Rule: Three ways to identify which NPC is being influenced by the spear before they act.

Pre-Session Preparation

Tracking Session 2 Outcomes

Before writing any prep notes, confirm:

Question	Answer affects
Is Tribune Lucius alive and with the party?	His role in the journey and the grove ritual
Did the party make an alliance with Vercingetorix?	Navigation, tribal encounters, Thusnelda access
Is Augur Cassia with the party?	Ritual knowledge, the sacrifice choice
What is the Legate’s status?	Whether they’re being actively pursued
What is each character’s corruption level?	Scene 1 intensity, grove ritual stakes

Props & Handouts

Handout 6: The Forest Trail (Thusnelda’s Map) Draw this by hand on rough paper — never use clean geometric shapes

[A crude hand-drawn map showing:]
- Three rivers (the middle one with a crossing marked)
- A circle of seven stones (labeled in Germanic runes)
- A smudge where a fourth river would be (deliberately ambiguous)
- A warning symbol — crossed spears — at the forest's heart
[At the bottom, in Germanic: "Mannaz raidho wunjo" = Man, Journey, Joy. Or: "The man who makes this journey finds what he seeks."]

Handout 7: The Bloody Message Write on paper soaked in tea then dried, torn at edges

[Found carved into a tree at camp, deep cuts made in darkness]

MARS VIDET OMNIA
(Mars sees all)

[Below it, scratched as if made with a fingernail rather than a knife]

I did not want to do this.

Physical Props: - A dark stone (obsidian or black pebble) to represent the spear’s pull — pass it to whichever player is carrying the spear - Keep a second set of character sheets with corruption levels updated - Prepare a folded note to pass to the “influenced NPC” player privately at the start of Scene 1 (see DM Notes)

Reactive World Setup

NPC	Status This Session	What They’re Doing
Legate Corvinus	Pursuing with 8 legionaries if he survived Session 2	Motivated by the need to recover the spear before his disgrace becomes permanent
Tribune Lucius (if alive, with party)	Covering his uncertainty with competence	Genuinely doesn’t know if he’s doing the right thing; is watching Cassia
Augur Cassia (if with party)	Barely holding it together; the forest’s old power speaks to her divine heritage	Increasingly certain the sacrifice must be her; hasn’t told anyone
Vercingetorix (if allied)	Navigating them through his people’s territory	Keeping a war-band of six warriors nearby as protection; not mentioning it
Thusnelda (new NPC)	Waiting at her grove, expecting them	She performed an augury three days ago. She knew they were coming.

The Forest Journey: Two Days of Travel

The journey from the fort to Thusnelda’s scouts takes two full days. This is not empty time. The forest is not neutral territory.

At the start of each travel day (or whenever pacing demands it), roll a d8 or choose from this table. Each event should take 10-15 minutes of table time – no more.

d8	Event
1	The Spear Pulls North. The cart carrying the spear slowly angles itself northward on flat ground. No one is steering it that way. DC 12 Arcana or Religion to understand it’s tracking toward the sacred grove – an instinct, not consciousness.
2	A Roman Scout. A lone legionary from the fort spots the party from a ridge. He’s young, clearly terrified, clearly under orders to follow. The party must decide: capture him, send him back with a warning, or ignore him and know he’ll report their heading.
3	Germanic Watchers. They’ve been visible in the treeline for an hour. Not hostile – yet. If Vercingetorix is with the party, he raises a fist and they pull back. If not: DC 14 Persuasion using any Germanic phrase from the player guide, or they shadow the party all night.
4	The Spear Dreams. The character carrying the highest corruption wakes screaming from a brief vision mid-march: they saw themselves standing over the entire party’s bodies, holding the spear, and they were smiling. The character describes this to the table. Thusnelda, if present, listens. She says nothing.
5	A Shrine in the Trees. A small Germanic offering-post – carved wooden figures, dried herbs, a deer skull – stands at a fork in the path. The left path goes into deep forest. The right path is the route. If the party disturbs the shrine: the deer skull’s eye sockets glow briefly, and wildlife avoids the camp that night (advantage for the Legate’s trackers).
6	Varro’s Choice (if Varro is still with the party). He stops at the treeline of a particular valley and looks across it for a long time. “My grandfather’s cohort marched through here. Forty years ago. None of them came back.” He doesn’t explain. He keeps walking.
7	The Spear Goes Quiet. For several hours, the spear’s runes stop glowing and the pull disappears. The forest feels almost normal. Then, suddenly, it resumes – stronger than before, as if it drew a breath. Characters with corruption 2+ must make a DC 11 Wisdom save or feel the urge to unwrap it and hold it, “just to check it’s still there.”
8	Rain. A cold Germanic rain turns the paths to mud. Movement is halved. The Legate’s tracking becomes easier (his dogs can still smell the spear; rain doesn’t help with that). Any character without a cloak takes 1 level of exhaustion if the party doesn’t shelter for 2 hours.

Scene 0: Cold Open (5 minutes)

Start in media res — the camp is wrong.

They’ve been traveling for two days. They’re camped in a clearing that should feel safe. It doesn’t.

Read aloud:

You wake before dawn. The forest is completely silent.

Not quiet — silent. No birds. No insects. No wind in the branches. The kind of silence that has weight.

The spear is glowing.

A faint red light pulses from its wrappings like a heartbeat. Around the cart carrying it — the dead zone. Everything within five feet of it is still. A leaf is frozen mid-fall between the spear and the ground.

One of your companions is standing beside it. They’ve been there for some time. They aren’t moving.

On a nearby tree, carved deep into the bark, words in Latin:

MARS VIDET OMNIA

DM Direction: The companion standing by the spear is the NPC the party trusts most — or whichever party member drew the short straw privately (see DM Notes). They don’t remember getting up. When questioned, they’re genuinely confused and frightened. They didn’t do it consciously. Not yet.

Don’t resolve this. Just put it in the air. Cut to Scene 1 immediately.

Scene 1: Something is Wrong

Three dead birds lie near the camp perimeter. Then the party finds the handout — Handout 7, carved into a tree. One of their NPCs made it. They don’t know they did.

Identifying the Influenced Character

The spear’s influence is gradual. One NPC in the party is being slowly possessed — not controlled, but pulled. The DM should pass a folded note to that player at session start (see DM Notes for the note’s contents). The player knows; the other characters don’t.

Three ways to identify the influenced NPC before they act:

Clue 1: The Physical Signs DC 13 Perception or Medicine: - Their eyes have a faint red tinge in direct light - They’ve been rubbing the same spot on their arm repeatedly (where they touched the spear in Session 1) - They’re sleeping with their face turned toward where the spear is stored, even if the spear moved

Clue 2: Their Behaviour DC 14 Insight during conversation: - They advocate for keeping the spear more strongly than before, but can’t articulate why - They become visibly agitated when someone else touches or moves the spear - When asked directly “Are you alright?”, there’s a micro-pause before they answer

Clue 3: The Spear Reacts If the party examines the spear’s wrappings or attempts to read its aura (Arcana DC 13 or Religion DC 14): - The spear “leans” — physically tilts — in the influenced NPC’s direction - Anyone sensitive to divine energy (Clerics, Paladins) can feel the connection - Cassia, if present, sees the influence immediately: “There’s a thread between that person and the spear. I missed it. I’m sorry, I missed it.”

What the Influenced NPC Does if Undetected

At Scene 4 (the grove), the influenced NPC attempts to stop the ritual — not violently at first, but with increasingly urgent arguments. If not caught, they attempt to take the spear and run at the ritual’s climax. They can be brought back with a successful DC 15 Wisdom saving throw from the party (as a group action — holding them, calling to them, breaking the connection through sheer human contact). If the party succeeds, the NPC is devastated by what they nearly did.

Scene 2: Thusnelda’s Scouts

Germanic scouts find the party. What happens next depends on Session 2.

If allied with Vercingetorix:

Four figures appear in the trees. Forest-dark clothes, no armor. One raises a hand — not a weapon.

Vercingetorix says, quietly: “My people. We are safe here.”

The scouts offer to take the party to Thusnelda, a druid who tends the sacred grove. They know what the party is carrying. They’ve been expecting them.

Toll: Information about Roman troop movements along the southern Limes. Moral weight: Sharing this is technically treason. It’s also practically necessary.

If not allied:

Ambush — 12 Tribal Warriors, 2 Scouts (CR 1/2 each) in the tree line. The forest negates Roman tactics: no formations, difficult terrain, low visibility.

Can be ended diplomatically — drop weapons, use Persuasion DC 14 with any Germanic phrase from the player guide, or demonstrate they’re trying to destroy the spear (the scouts recognize it and stop). Vercingetorix appears if combat goes 3+ rounds regardless — he’s been following.

Thusnelda — arriving with the scouts or separately:

A small, ancient-looking Germanic woman. She carries an oak staff carved with spiraling runes. She smells of pine smoke and something metallic. She looks at the spear and then at the party with the calm gaze of someone who has spent decades looking at hard things.

“God-Killer. Still breathing. I had hoped you would destroy it by now. I see you have not.”

She knows: - Where the grove is (one full day’s travel, through the river) - That the grove demands a willing sacrifice — not a death, but a loss of something real - That the ritual will alert Mars. He will come. That cannot be avoided. - That the party will succeed or fail based on what they’re willing to give up, not on their fighting ability

She will guide them. She asks nothing in return — this is her purpose.

Thusnelda speaks like a woman with no time for anything except the truth:

“The spear belongs to no one. Not the god who made it, not the tribe that used it, not the empire that found it. It belongs to the wound it keeps open. You must close the wound.”

“Your friend there” – she looks at the influenced NPC – “has a thread in them. Cut it soon. The forest is not kind to loose threads.”

“Fear the grove’s demand. Most people who come here for the ritual choose something that hurts a little. That is not enough. The grove will know.”

Additional sample dialogue for Thusnelda across the journey:

When a character asks her how she knows about the spear: “My teacher’s teacher sealed it. I have been waiting for it to surface since I was eleven years old. I am seventy-three. You are late.”

When someone suggests there might be another way to destroy it: “There is not. I have thought about this for sixty years. The grove is the only place where what was made in divine anger can be unmade. This is not an opinion.”

When asked what happens to her after the ritual: “I go back to the grove. I tend it. I wait to see what god pays attention next. I have been doing this my entire life. It is good work.”

When pressed on whether the ritual always works: “No. My teacher failed. I watched her fail. The sacrifice was wrong. I will not let that happen again. That is why I am telling you now, here, in the forest, before you are standing at the altar and making panicked decisions.”

When someone tries to thank her: “Do not thank me. Finish it. That is thanks enough.”

What Thusnelda will and will not say:

She will say	She will not say
Exactly what the ritual requires	What the “right” sacrifice is for any specific character
That the grove rejects insufficient sacrifices	Whether a sacrifice is “good enough” before it is offered
That someone in the party is influenced	Who it is – she knows, but sees this as the party’s work to discover
What the stakes of failure are	Whether she believes the party will succeed

Scene 3: The River Crossing

The sacred grove is on the far side of the Vitulans river — currently swollen with spring melt. The crossing is hard under normal circumstances. It’s harder with pursuers.

The river: 90 feet wide. Fast-moving (DC 13 Athletics to swim). A fallen oak spans the narrowest point, slippery (DC 11 Acrobatics to cross without falling). Rope can be strung across (DC 10 Athletics as a group action) to help everyone.

The pursuers arrive:

If the Legate is pursuing: his advance force catches up exactly when the party is mid-crossing. - 8 Legionaries (use Guard stat blocks) - 1 Centurion (use Knight stat block, CR 3) - The Legate himself if he’s still in the picture: use Veteran stat block

The split-party set piece: - Half the party is on the far bank, half still crossing or on the near bank - Ranged combat across the water (half cover for anyone behind the banks) - Melee on the fallen log (anyone knocked off: DC 13 Athletics to avoid being swept 20 feet downstream) - The river is impassable to heavy armor (Strength save DC 14 for anyone in metal armor who falls in)

The moral choice: The legionaries are just following orders. They’ve committed no crime. They have families and years of service ahead of them. - Killing them is technically murder by Roman law - Letting them cross means a fight the party might not win - Destroying the log severs pursuit but means whoever’s still on the near bank is cut off

Varro (if present) will not fight his own men. He’ll stand at the bank and let the party cross, then step aside. The legionary centurion will recognize him, hesitate, and that hesitation might be all the time needed.

Scene 4: The Sacred Grove

A day past the river. The forest thins. Then it opens.

Read aloud:

Seven standing stones ring a granite altar. Each stone is twice your height and carved with spiraling runes that don’t hold still when you look at them directly — they seem to shift, rearranging themselves, as if the stone itself is thinking.

The air is different here. Heavier. Older. The spear pulses in long, slow throbs now, like a heart slowing toward sleep.

Thusnelda kneels at the altar. She doesn’t speak immediately. Then:

“Leave nothing at the door. What you carry in, you carry to the altar. All of it. The weapon, the doubts, and whatever part of you this journey has taken.”

The Ritual Requirements

Thusnelda lays out what is needed:

The spear must be placed on the altar, unwrapped, bare iron on stone
Blood from a warrior must anoint it — voluntary, 1d6 damage, cannot be healed until after the ritual
The group must speak in unison: “We unmake what was made in darkness.” (in Latin or Germanic — both work)
A sacrifice must be offered willingly — something of genuine value, given without coercion

The sacrifice must be real:

Offer	What it means	The grove’s response
A valuable magic item	Loss of power	Acceptable
A proficiency	Permanently lose one skill proficiency	Acceptable
A memory	Choose one important memory — it’s gone	Acceptable — grove returns a dream in its place
A year of life	Lifespan shortened	Acceptable
Cassia volunteers herself	Death, willingly	More than acceptable — Thusnelda tries to stop her
Something with no real cost	Any item worth less than the character cares about	The altar goes cold. Nothing happens. The grove knows.

The influenced NPC’s crisis moment:

As the ritual begins, the influenced NPC feels the connection intensify. This is the moment they either break free or break.

If detected and supported: the party can help them resist with a group Wisdom check (DC 14). Success means they participate in the ritual and their corruption is cleared by the grove’s power. Failure means they physically grab for the spear mid-ritual — not maliciously, but driven. They can be stopped without combat (Athletics grapple DC 12, or someone calling their name three times). If stopped this way, they collapse, weeping, with no memory of the last hour.

Scene 5: Mars Intervenes

The ritual begins. The spear lights up. And Mars arrives.

Not physically. As a presence — a pressure in the air that makes the stones vibrate and causes every shadow to point toward the altar regardless of the light source. Then his voice, from everywhere and nowhere:

Read aloud:

“MORTALS.”

The word is not a sound. It moves through you like a wave, like a bell struck inside your chest.

“YOU DARE UNMAKE WHAT A GOD FORGED.”

The standing stones crack. Not shattering — cracking, like old bones, like the grove itself is bracing for something.

Thusnelda doesn’t move. Her voice is steady:

“Finish the ritual. Do not look up. Whatever you see, do not look up.”

Three Ways to Complete the Ritual

Option A: Combat — hold the grove against divine wrath

Mars manifests as divine wrath through the stones themselves: - Animated Standing Stones: 3 Stone Golems (CR 10) but with 120 HP each — they’re avatars of Mars’ anger, not the full thing - While some party members fight, one holds the ritual (see Skill Challenge below) - Destroying the golems doesn’t end the ritual — it just buys time

Option B: Skill Challenge — complete the ritual under pressure

4 successes before 3 failures. Each round, one person holds the ritual while others defend: - Religion DC 14 — speak the words of unmaking with genuine conviction - Arcana DC 15 — channel the grove’s ancient power, not fighting it - Athletics DC 12 — hold the spear steady as it fights back - Insight DC 14 — resist the spear’s final promise (“They’ll abandon you. Take me and they won’t have to.”)

Failures mean the ritual stumbles, and Mars’ pressure increases: each failure adds one animated stone.

Option C: Bargain — offer Mars something before the ritual begins

If the party steps back from the altar and speaks to Mars directly (Persuasion DC 17 or Religion DC 16): > “Great Mars, the spear was being used to corrupt and destroy men in your name. We destroy it not to defy you, but because what it was doing dishonored what you stand for.”

A long silence. Then: > “…CONTINUE. I WILL NOT MAKE IT EASY. BUT I WILL NOT STOP IT.”

This gives advantage on all Skill Challenge rolls.

Conclusion

If the spear is destroyed:

The iron shatters — not with a bang, but with a sound like an exhalation. Like something finally resting.

The runes on the standing stones go dark. The air clears. Somewhere far away, in a direction that isn’t quite north, you hear a sound that might be a god, furious, far off.

The influenced NPC’s eyes clear. They look at their hands. They look at the grove. They say nothing for a long time.

Thusnelda sweeps iron fragments from the altar into a clay pot and seals it with beeswax. “I will bury these in seven places,” she says. “It will take time. Go before he finds his voice again.”

Any corruption below level 5 is reduced by 1. Level 5 characters remain affected — the ritual was about the spear, not about them.

If the ritual fails or is interrupted:

The spear remains intact. Mars’ presence intensifies and will not leave until the ritual is completed or the spear leaves the grove. They must flee into the forest with a partially-completed ritual, a god’s attention, and a cursed weapon they came to destroy. Session 4 begins in a worse position.

Advance to Level 6

DM Notes

OGAS This Session

Vercingetorix the Red (if present) - Objective: Protect his people - Goal (this session): Ensure the spear is destroyed at the grove — this is his people’s three-generation wound - Agenda: Guide, protect, and keep the party moving toward the grove even when they want to stop - Secret: He is dying. This is his final campaign. He hasn’t told anyone because it would change how they treat him, and he doesn’t want that.

Thusnelda (new NPC) - Objective: Maintain the grove’s power and fulfill her duty as its keeper - Goal (this session): Get the party through the ritual correctly - Agenda: Be completely honest about what the ritual requires, even when that honesty is painful - Secret: She performed this ritual once before, fifty years ago, with Vercingetorix’s grandfather. It failed because the sacrifice was unwilling. She has carried that failure since.

Mars (divine presence) - Objective: Reclaim his dignity and have his weapon back - Goal (this session): Stop the ritual - Agenda: Apply pressure through the influenced NPC, through the grove itself, through the confrontation at the end - Secret: He’s been watching this party since Session 1. He respects what he’s seen. He won’t admit this.

The Influenced NPC — Private Note

At session start, pass the influenced player this folded note: “You woke last night and stood beside the spear for two hours. You don’t remember doing this. The spear feels warm when you’re near it. It has been making an argument, quietly, that makes a certain kind of sense: the power in this weapon could protect the people you care about. You haven’t told anyone. You’re not sure you’re wrong.”

This player should roleplay subtle changes — nothing dramatic until the ritual. The revelation should feel earned, not shocking.

The Sacrifice — What Works

The grove is a mirror. It reflects what a character actually values versus what they claim to value. If a player tries to sacrifice something they don’t care about, Thusnelda will know immediately:

“That is not a sacrifice. That is a fee. The grove is not a toll booth.”

The DM should know each character’s central motivation (from Session 0) and gently push toward a sacrifice that actually costs something in that direction. A warrior who lives for glory might lose their greatest battle memory. A soldier who dreams of retirement might lose a year of life. A cleric who values divine connection might lose one prepared spell slot permanently.

The sacrifice is permanent. Honor it.

DM Guidance: Reading the Grove’s Response

The grove does not communicate clearly. It communicates correctly. Here is how to signal acceptance or rejection:

If the sacrifice is genuine: The altar stone warms perceptibly when the object or thing is offered. The runes on the standing stones shift slightly, as if something large turned its attention toward the altar. Thusnelda closes her eyes and exhales. She says nothing, but she opens them again looking less frightened.

If the sacrifice is insufficient: The altar stays cold. The offered item (or words, for intangible sacrifices) simply sits there, unreceived. Nothing dramatic happens. The absence of response is the response. Thusnelda says, quietly: “The grove is not satisfied. Try again. You have time. Use it.”

If the party offers nothing real at all: After two attempts, the stones begin to cool and the grove’s ambient light dims. The ritual is failing. Thusnelda: “Something must be given or we leave here with the spear and come back when you are ready. There is no shame in it. But Mars will be closer next time.”

The thing she will not accept: “I sacrifice my life in the future, if necessary.” The grove is not interested in conditional sacrifice. The sacrifice must be now, irrevocable, freely given. If a player offers this: Thusnelda looks at them for a moment, then: “That is not a sacrifice. That is a bet. The grove is not a wager.”

Post-Ritual NPC States

After the spear is destroyed (or after a failed ritual), each NPC’s position shifts. Use this for Session 4 handoff.

NPC	If ritual succeeded	If ritual failed
Vercingetorix	At peace, even visibly lighter. Begins planning the journey home. Will embrace the party’s leader if they allow it – a Germanic gesture of warrior-kin.	Devastated. Three generations of his family carried this wound. He will not say it, but his face says it.
Thusnelda	Methodical. Begins collecting iron fragments immediately. Gives the party one sealed clay jar each: crushed sacred herbs, for safe passage in the forest. Then goes quiet.	She blames herself. She will say “I will prepare the grove again. Come back when you are ready. I will be here.” She means it.
Cassia (if present)	Collapses against a standing stone, weeping – not from grief but from relief. Her visions stop for the first time in weeks. She asks if she can stay in the grove for one night alone.	More determined than devastated. “The omens are still bad but the shape has changed. There is still a path. I need to think.”
Tribune Lucius (if present)	Looks at the iron fragments for a long time. Then: “My father was wrong about what this was. He thought it was a political tool. He didn’t know what it was.” First honest thing he’s said out loud.	Practical and brisk – this is how he handles fear. “We need to move. The Legate is still out there. Being stopped here with a failed ritual and a still-active cursed weapon is a poor position.”
The influenced NPC	Whether they broke free or were pulled back during the ritual, they are quiet after. The thread is cut. They feel its absence like a missing tooth – noticeable even when nothing is wrong. Let them narrate what the absence feels like.	If the ritual failed because of them: they are the most useful person in the group for finding a way to try again. They felt the spear’s logic from the inside. They know how it thinks.

The Influenced NPC: Roleplay Guidance for That Player

At session start, when you pass the private note, also tell the player these three things to do during Scenes 1-3 – nothing dramatic, nothing that breaks immersion, but things that will be recognisable in hindsight:

Scene 1 (cold open): When the group discovers someone was standing by the spear at night, your character is the first to suggest it might have been a sleepwalking episode or stress response. Not defensively – genuinely, helpfully. You’re trying to explain it away for yourself as much as anyone.
Scene 2 (Thusnelda encounter): When Thusnelda says “your friend there has a thread in them” and looks at you, your character breaks eye contact first and says something like “She means the spear in general, doesn’t she?” – redirecting. Again, not consciously, not maliciously. You simply cannot hold her gaze.
Scene 3 (river crossing): During the most stressful moment of the crossing, your character is unnaturally calm. Not helpful-calm – still-calm, the way a person is still when they are listening to something no one else can hear. If anyone asks, you have no explanation for it.

These three moments should not be pointed out by the DM. They are for the player to plant and the other players to notice, or not, until the ritual makes it undeniable.

This session should feel like the pressure never fully releases. The investigation of the cold open mystery, the river crossing, the grove itself — there’s no safe moment until after the spear is destroyed. Push toward the grove. The forest is hostile to lingering.

Skill Audit: Session 3

Forest travel: spread skill demands across the table.

The travel events should each call on a different character’s strength. Check this before you run. Nobody should dominate the forest crossing. The table below shows the right approach and a backup approach for each event: both should work, both should feel like genuine options.

Event	Primary skill	Alternative (different door, not failed door)
Wind-felled oak	Athletics DC 12 to clear or climb	Survival DC 10 to find a safe path around
Hanging charms	Persuasion DC 13 to pass without offense	Religion DC 11: understand the boundary and perform a basic acknowledgment rite – no social check required, just knowledge
Silent animal trail	Survival DC 12 to track	Nature DC 14 to identify the specific hunter; wolf signs vs. something else changes the response
Old Roman standard	Investigation DC 12 to read dates	History DC 14 to name the expedition and what happened to it; this one lands harder
Boggy hollow	Acrobatics DC 12	Nature DC 10 to read the plants and identify firm ground; this route avoids the roll entirely
Watchful raven	Insight DC 12 to read it correctly (omen, not threat)	Animal Handling DC 10 to acknowledge it respectfully; the raven leaves satisfied
Blood-slick stones	Religion DC 14 to read runes	Investigation DC 12 to date the sacrifice; within 24 hours changes everything
Whispering pines	Wisdom save DC 12	Performance DC 12 to give the whispers a response that satisfies them; costs one round but removes the disadvantage

Temporal gate: river crossing boot print:

One round. DC 11 Perception, and only if someone is watching the bank rather than the river.

On success: Military sandal, size 10, made within the last two hours, heading north. Corvinus has scouts ahead of them.
What it opens: They can send a decoy, move off the main path, or prepare for scouts at the grove. Without this read, Corvinus’s scouts are already watching when they arrive. One check, one round. Make it count.
Why the window closes: Rain washes it. The crossing scene ends, the rain intensifies, the print is gone. Not because the game decided to close the door – because that is what rain does to boot prints in mud.

Thusnelda trust: the first meeting.

Do not move this entirely through narrative. The key moment is when she decides whether to lead them to the grove. Give it a DC.

DC 14 Persuasion, backed by something genuine (sparing a prisoner, a gift, Vercingetorix vouching): She leads them.
DC 18, or Germanic language proficiency, or DC 15 Religion to speak her ritual language: She leads them AND volunteers the piece of grove knowledge they did not know to ask for: the lock in the altar’s northwest face, and what it opens.
Fail: She says “Tomorrow.” That is not a refusal. The party camps in the forest for one night. One additional forest event occurs overnight. The window does not close: it costs time. That is the right consequence.

Cascade unlock: Vercingetorix’s dying admission (DM only)

This only becomes available after the ritual, when the party has shown what they are made of. A genuine sacrifice opens it; a token sacrifice does not. That is not a punishment: it is Vercingetorix applying the same standard he applies to everyone.

DC 14 Insight after the ritual to notice he is holding something back.
If a player asks directly: he tells them.
The admission: he knew three months ago that Brutus’s agents were in contact with two of the warband chieftains surrounding Vindolanda. He did not say anything because he was not sure the party was worth trusting with information that would get them killed. Now he is sure.
What it opens in Session 4: the party can split the siege by targeting those specific chieftains. Sigrun knows more if they can reach her. Write this in your Session 4 notes now.