Painwracker Oni is a uncommon Creature — Demon Spirit card from Champions of Kamigawa (CHK), collector number 136. Current market price: $0.18 (foil $0.50), TCGplayer market prices via Scryfall.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) At the beginning of your upkeep, sacrifice a creature if you don't control an Ogre.