Scarab armor set that buffs thorns damage and adds it to melee and ranged. Which is stronger than it sounds. 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. https://socialskates.com/story19210335/quanto-voc%C3%AA-precisa-esperar-que-voc%C3%AA-vai-pagar-por-um-bem-core-keeper-gameplay