This is required if you want to use Slots mod with Friendly HUD mod and path example: D:\Steam\SteamApps\common\ The Witcher 3 \mods). The Witcher 3 » Skills and Leveling This mod unlocks all skill slots and mutagen slots at level 0, allowing the player to customize geralt with. Hmm I remember having one that they were all just auto equipped and you didnt have to put them in slots. That'll work though. #2. jss.