No Gods, Only MonstersThe Witcher IV is an upcoming single-player open-world RPG from CD PROJEKT RED, the creators of Cyberpunk 2077 and The Witcher 3: Wild ...
Sadly, none of this denoted a happy ending. Though the wounds on Lena’s body healed, the toxins in the witcher’s brew had melted her mind. This was not the first time a cure had proven worse than the disease
https://witcher.fandom.com/wiki/On_Death's_Bed
The witcher potions are RIDICULOUSLY toxic