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://homeworld373738.thenerdsblog.com/35446964/quanto-você-precisa-esperar-que-você-vai-pagar-por-um-bem-core-keeper-gameplay