Vile Powder

Vile Powder can be used to return hallowed blocks to normal, such as Pearlstone to Stone, Pearlsand to Sand and hallowed grass to normal grass. It is essentially the opposite of Purification Powder. It can be used on a Bunny to create a Corrupt Bunny or on a Goldfish to create a Corrupt Goldfish.

Each 5 Vile Powder are crafted from a Vile Mushroom at an Alchemy Station, and it is also sold by the Dryad NPC during a Blood Moon.

Vile Powder can be combined with Rotten Chunks at a Demon Altar to craft Worm Food, an item used to summon the Eater of Worlds. Vile powder can be used with Throwing Knives to upgrade them to Poisoned Knives but Vile Powder not inflicting poison may mean that it only causes poison when added with metal.

It is essentially the opposite of Purification Powder. It can be used to return

History
Poudre vile