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 can be used on a Bunny to create a Corrupt Bunny or on a Goldfish to create a Corrupt Goldfish.

5 Vile Powder is crafted from a Vile Mushroom at an Alchemy Station, and it is also sold by the Dryad NPC during a Blood Moon, though it is cheaper and normally easier from a Vile Mushroom

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.

Vile Powder also gives off a small amount of light, making it semi-useful as an emergency light source.

History
Poudre vile