Myrel, Shield of Argive is a mythic Legendary Creature — Human Soldier card from The Brothers' War (BRO), collector number 305. Current market price: $20.49 (foil $37.57), TCGplayer market prices via Scryfall.
During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments. Whenever Myrel attacks, create X 1/1 colorless Soldier artifact creature tokens, where X is the number of Soldiers you control.