Mirror-Shield Hoplite is a uncommon Creature — Human Soldier card from March of the Machine (MOM), collector number 247. Current market price: $0.13 (foil $0.30), TCGplayer market prices via Scryfall.
Vigilance Whenever a creature you control becomes the target of a backup ability, copy that ability. You may choose new targets for the copy. This ability triggers only once each turn.