Back to AbytheraTales by Xero logo
Abythera mission 01 · One-shotArchive / 01.01
From the world of Abythera

Karrhold

A Seed of Corruption

A massive white yeti with glowing red eyes and dark fungal corruption snarling in the snow.
Drelthar / CorruptionThe Corrupted Yeti · Three-phase boss
The opening

The corruption has taken root in Karrhold, and something in the snow is changing with it.

High in the frozen Drelthar Mountains, a village is losing its livelihood. Glowing fungal corruption infects its plants, changes its animals, and spreads to its people. Your group comes to Karrhold to find the source and save the village.

The answers lie in conversations with villagers and tracks through the snow. A corrupted yeti is at the center of the threat. Before facing it, you can learn what makes it vulnerable and decide who to help along the way.

Format
Standalone one-shot
Players
3-5 players
Focus
Investigation & atmospheric horror
In Abythera
Mission 01 · Included in the framework
View on DriveThruRPG
01

Clues that give you the edge

Your investigation changes how you can face the yeti. Good preparation reveals weaknesses to exploit during its three-phase boss fight.

02

Explore the village your way

Talk to an old elven tailor, seek the town's only warmth at the tavern, or follow the tracks into the snow. What you pursue, who you trust, and how you respond to the corruption are up to you.

03

See the consequences later

In Abythera, Karrhold introduces corruption and choices with lasting consequences. As a standalone adventure, it needs no knowledge of the framework.

Characters

Faces in the snowstorm

Caelen and Rika have leads worth following before you climb into the yeti's territory.

Holt Vondrak, a translucent celestial figure polishing a glass behind a rustic tavern bar.01
Tavernkeeper · First Contact

Holt Vondrak

Holt runs The Stone's Breath and helps newcomers find their footing in Karrhold. His quiet advice suggests he knows more about the village than he says.

Caelen, an older elf burning glowing blue-veined leaves in a copper brazier.02
Tanner · Blight investigator

Caelen

Caelen is an old elven tailor with an eye for details others overlook. His work has brought him close to mysteries Karrhold would rather leave alone.

Rika, a goblin scout carving wooden bolts in the snow outside a cabin while a giant silhouette looms in the mist.03
Mountain Scout · Tracker

Rika

Rika has already fought mutated creatures beyond Karrhold's walls. She knows the mountain paths and the signs of danger, but not everything out there leaves a trail.

A massive white yeti with glowing red eyes and dark fungal corruption snarling in the snow.04
Three-Phase Boss · Apex Threat

The Corrupted Yeti

The fight unfolds across three phases, each with its own mechanics. The weaknesses your group uncovers can give you an edge at key moments.

The adventure / 01

Work out what is happening

Karrhold opens with a community under pressure. Talk to the villagers, examine the decay, and piece the clues together yourselves. Who you help and how you respond to the infection are decisions your group has to live with.

The adventure / 02

Prepare for the final fight

The final fight unfolds across three phases, each changing how the group has to respond. What you uncover in Karrhold can give you an edge when it matters.

The adventure / 03

At the GM's table

The adventure has no fixed scene order or overall time limit. The GM can follow the group's investigation as it develops. A reference sheet keeps NPCs, clues, and session flow close at hand.

Artwork & maps

Into the Drelthar peaks

Locations and GM material from the Karrhold expedition.

A snowy village perched on a steep mountain cliff under a stormy sky.Arrival
The Cliffside VillageKarrhold clings to a frozen precipice at the end of a winding mountain path.
Frozen crags and steaming fissures beneath dark storm clouds in the mountains.The Ascent
GewittergradSteaming volcanic fissures, black ice, and red corruption veining the high pass.
Karrhold GM reference sheet.Tabletop Tool
One-Page GM ReferenceBuilt for in-person play, with session flow, NPC motives, clue connections, and boss preparation at a glance.

Karrhold is included in full in the Abythera Campaign Framework. If you own the framework, you already have this adventure.

Available to download

Bring it to your table.

Available on its own and included in the Abythera Campaign Framework.

View on DriveThruRPG
The world behind the adventureAbytheraBuild your campaign one mission at a time.
Where to next?
Back to all worlds