Grave Hag Decoction
Grave Hag Decoction is a decoction, a strong witcher potion made from a monster mutagen in The Witcher 3. A decoction lasts a long time but adds a lot of Toxicity, so it fits builds with high Toxicity tolerance.
Brewing it needs 1 Dwarven Spirit, 1 Grave Hag Mutagen, 1 Longrube, 1 Cortinarius.
Keep exploring
Plan a Remastered build: skill trees, mutagens, gear and a shareable build image.
Pick a potion, decoction or bomb and see every ingredient you need.
Answer the key choices and find out which Witcher 3 ending you will get.
Every location, quest and monster in the first region on one map.
The Wolf School's hidden valley: the keep, the Bastion, caves and treasure.
Tick off every school gear diagram and crafted piece, with diagram locations.
Search any monster and see the right oil, Signs and bombs.