Yawgmoth Demon is a rare Creature — Phyrexian Demon card from Chronicles (CHR), collector number 42. Current market price: $0.41, TCGplayer market prices via Scryfall.
Flying (This creature can't be blocked except by creatures with flying or reach.) First strike (This creature deals combat damage before creatures without first strike.) At the beginning of your upkeep, you may sacrifice an artifact. If you don't, tap this creature and it deals 2 damage to you.