Marshal's Anthem is a rare Enchantment card from Commander 2015 (C15), collector number 74. Current market price: $0.29, TCGplayer market prices via Scryfall.
Multikicker {1}{W} (You may pay an additional {1}{W} any number of times as you cast this spell.) Creatures you control get +1/+1. When this enchantment enters, return up to X target creature cards from your graveyard to the battlefield, where X is the number of times this enchantment was kicked.