Soul Drainer is a uncommon Creature — Giant Wizard card from Unknown Event (UNK), collector number UB06. Current market price: $17.99, TCGplayer market prices via Scryfall.
Deathtouch When Soul Drainer enters the battlefield, destroy target commander an opponent controls. Remove all commander damage that commander dealt to you. (You don't gain life, just treat it as though your commander damage from that commander is zero.)