Water hag mutagen is an alchemy ingredient in The Witcher 3: Wild Hunt and is used to craft water hag decoction. They act like lesser red mutagens when placed in the diamond-shaped slots in the character panel.
Like all special mutagens they can only be dropped by a corresponding monster. However, despite the name, regular water hags can't drop this mutagen, and it is only dropped by their stronger variation, bilge hags. Abaya during Contract: Muire D'yaeblen is the one guaranteed source, while regular bilge hags are otherwise only seen around a few guarded treasures, the treasure hunt quest Battlefield Loot, and one during Carnal Sins.
Notes[]
- In an undocumented change for Patch 1.08, all mutagen icons were changed. However, there was still a bug for those on Steam and Origin that didn't reflect this and was later fixed in Patch 1.22. Despite this, some may still see the original icons instead, even with a fully patched game.