The Witcher 2 mutagens

In The Witcher 2: Assassins of Kings, mutagens are powerful mutation-triggering agents and (with patch 1.3 installed) alchemy ingredients. They allow you to raise your abilities even further. Mutagens can be acquired in two ways: you can loot them from defeated enemy corpses or you can create them as random by-products of alchemy. To undergo mutation, enter meditation and then select the "Character" option and find an ability with a mutagen slot. Mutations cannot be reversed; as such, it is strongly recommended that you never use lesser or basic mutagens, only greater ones. It is also recommended to have the impregnation talent from the alchemy tree at level 2 before using any mutagens, because that skill does not affect mutagens which have already been applied.

Mutagens usually take one of three forms: lesser, basic and greater. Each of these forms raises Geralt's statistics by different amounts.

Mutagènes dans The Witcher 2