Wither bones

Upon killing wither skeletons you can get wither bones which would have many uses! It can be turned into withered bonemeal which can be used as another source of black dye. The bonemeal can also be used to grow nether based vegetation faster but will make overworld life decay and die out. And possibly one of the best features would be to use the bonemeal in potion brewing to make withering potions! And maybe the bones can be used to tame a nether mob? Nether dogs could become a thing? Just a thought.