Dark Apostle is a rare Creature — Astartes Warlock card from Warhammer 40,000 Commander (40K), collector number 75. Current market price: $0.39, TCGplayer market prices via Scryfall.
Gift of Chaos — {3}, {T}: The next noncreature spell you cast this turn has cascade. (When you cast that spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)