Withered Bones

Wither skeleton are black. But they drop white bones? That doesn't make sense! What if they dropped withered bones? These bones could be used as fuel or something else. A cool idea is you could brew it with healing potions and make Poison Resistance. This counts for poison and the wither effect. You Could also craft it down into coal if you need. Another thing they could be used for is a withered bone block, you get it. And withered bonemeal which will grow nylium, nether wart, and other nether related items but will kill overworld plants.