Unity of Purpose is a uncommon Instant card from Oath of the Gatewatch (OGW), collector number 66. Current market price: $0.11 (foil $0.20), TCGplayer market prices via Scryfall.
Support 2. (Put a +1/+1 counter on each of up to two target creatures.) Untap each creature you control with a +1/+1 counter on it.