After playing many games like this which have a better storage/crafting system, it's really hard to play this game tbh 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://baldur-s-gate-3-gameplay32086.p2blogs.com/29250181/o-guia-definitivo-para-core-keeper-gameplay