Let the Galaxy Burn is a rare Sorcery card from Warhammer 40,000 Commander (40K), collector number 81★. Current market price: — (foil $1.03), TCGplayer market prices via Scryfall.
Cascade (When you cast this 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.) Let the Galaxy Burn deals X plus 2 damage to each creature that didn't enter this turn.