Loyal Unicorn is a uncommon Creature — Unicorn card from Commander Masters (CMM), collector number 40. Current market price: $0.28 (foil $0.49), TCGplayer market prices via Scryfall.
Vigilance Lieutenant — At the beginning of combat on your turn, if you control your commander, prevent all combat damage that would be dealt to creatures you control this turn. Other creatures you control gain vigilance until end of turn.