Defiling Daemogoth is a rare Creature — Demon card from Secrets of Strixhaven Commander (SOC), collector number 25. Current market price: $0.58, TCGplayer market prices via Scryfall.
Menace Whenever a creature you control deals combat damage to a player, you gain 1 life. At the beginning of your end step, each opponent loses X life, where X is the amount of life you gained this turn.