Vona de Iedo, the Antifex is a rare Legendary Creature — Vampire Cleric Knight card from Alchemy: Outlaws of Thunder Junction (YOTJ), collector number 28.
Menace When Vona de Iedo enters, destroy target nonland, nontoken permanent an opponent controls. Then you may discard a card. If you do, conjure a duplicate of that permanent into your hand, and the duplicate perpetually gains prismatic.