Skull of the Corrupted Shaman at his sigil in a throne room arena. This is found in The Forgotten Ruins at a range of 350 tiles from The Core. Malugaz is an extremely tough boss who will probably still be a challenge while using equipment from the outer biomes. https://baldursgate3gameplay29516.ltfblog.com/29170327/ajudar-os-outros-perceber-as-vantagens-da-core-keeper-gameplay