For all my peaceful players, you can craft ALL hostile mob drops.
Recipes:
Gunpowder
Nether Star
Prismarine Crystal
Prismarine Shard
Rotten Flesh
Shulker Shell
Slime Ball
Sponge
Trident
Wither Skull
Blaze Rod
Bone
Dragon Egg
Ender Pearl
Ghast Tear
Froglights
