Icewrought Sentry is a uncommon Creature — Elemental Soldier card from Wilds of Eldraine (WOE), collector number 55. Current market price: $0.20 (foil $0.35), TCGplayer market prices via Scryfall.
Vigilance Whenever this creature attacks, you may pay {1}{U}. When you do, tap target creature an opponent controls. Whenever you tap an untapped creature an opponent controls, this creature gets +2/+1 until end of turn.