Zephyr Sentinel is a uncommon Creature — Human Soldier card from The Brothers' War (BRO), collector number 74. Current market price: $0.17 (foil $0.28), TCGplayer market prices via Scryfall.
Flash Flying When this creature enters, return up to one other target creature you control to its owner's hand. If it was a Soldier, put a +1/+1 counter on this creature.