Call to the Grave is a rare Enchantment card from Magic 2012 (M12), collector number 85. Current market price: $1.30 (foil $4.79), TCGplayer market prices via Scryfall.
At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature of their choice. At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment.