Pyrohemia is a rare Enchantment card from Secret Lair Drop (SLD), collector number 2211. Current market price: $15.79 (foil $16.09), TCGplayer market prices via Scryfall.
At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment. {R}: This enchantment deals 1 damage to each creature and each player.