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://gunnermvafi.blogproducer.com/36287941/o-fato-sobre-core-keeper-gameplay-que-ninguém-está-sugerindo