Myrel, Shield of Argive is a rare Legendary Creature — Human Soldier card from Secret Lair Countdown (SLC), collector number 13. Current market price: $19.24 (foil $25.74), 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.