Necrotic Skull - Br1andiam0nd/Slimefun-Server-Guide GitHub Wiki

Back - These lovely skull make you take a trip to the nether, chop off a wither skeletons head, grab that and about 32 nether wart a safely return home, not that easy. if You didn't catch it, you need a wither skeletons head, and the best way to get that is by the sword of beheading