Guiltfeeder is a rare Creature — Horror card from World Championship Decks 2003 (WC03), collector number pk68sb. Current market price: $1.20, TCGplayer market prices via Scryfall.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Whenever this creature attacks and isn't blocked, defending player loses 1 life for each card in their graveyard.