Rescue Retriever is a rare Creature — Dog Soldier card from The Brothers' War (BRO), collector number 288. Current market price: $0.39 (foil $1.26), TCGplayer market prices via Scryfall.
Flash When this creature enters, put a +1/+1 counter on each other Soldier you control. Prevent all damage that would be dealt to other attacking Soldiers you control.