Akoum Battlesinger is a common Creature — Human Berserker Ally card from Worldwake (WWK), collector number 71. Current market price: $0.21 (foil $1.39), TCGplayer market prices via Scryfall.
Haste Whenever this creature or another Ally you control enters, you may have Ally creatures you control get +1/+0 until end of turn.