Wither Skulls & Potions of Decay

Placing a Wither Skeleton Skull in a Brewing Stand should produce a Potion of Decay while leaving a skeleton skull behind.

The idea here is that all of the Witheriness is sucked out of the Skull and put into the potions, leaving behind a "purified" skeleton skull. This would make Potions of Decay harder to acquire than just brewing a Wither Rose, while remaining technically renewable and providing a nice bit of lore.

Thanks for reading! = )