Overview
The Toussaint Prison Experiment is a Blood and Wine treasure hunt at the Bastoy Prison Ruins in the Gorgon Foothills.
The hooded figure
A hooded figure stands motionless in the middle of the ruins. Up close, it turns out to be a powerful alp. Yrden, moon dust and Black Blood all help in the fight.
The chest
Search the nearby corpse for an old key and a clerk’s diary. After reading the diary, look for a small chest east of the marker, behind a wall, and unlock it. The first diagram for Scavenger Hunt: Grandmaster Manticore Gear is also close by.