Munda's Vanguard is a rare Creature — Kor Knight Ally card from Oath of the Gatewatch Promos (POGW), collector number 29s. Current market price: — (foil $0.52), TCGplayer market prices via Scryfall.
Cohort — {T}, Tap an untapped Ally you control: Put a +1/+1 counter on each creature you control.