The Witcher[]
Hydragenum, indicated in silver, is a basic alchemical substance. It is present in many ingredients, including herbs, minerals and monster parts. This category contains all ingredients with hydragenum as their primary substance.
The Witcher 2: Assassins of Kings[]
Hydragenum, now indicated in blue, is a basic alchemical substance. It is found in seven ingredients.
The Witcher 3: Wild Hunt[]
Unlike previous games, Hydragenum is not simply part of other alchemical ingredients. It is needed to craft the following items:
In the base game it must be crafted, but in the Blood and Wine expansion it can also be purchased from alchemists:
- Merchant at the Perfumery
- Wine Merchant at Chuchote Cave, after completing his quest
- Wine Merchant at Dun Tynne Hillside, after completing his quest