Tower Above is a uncommon Sorcery card from Shadowmoor (SHM), collector number 131. Current market price: $0.17 (foil $0.58), TCGplayer market prices via Scryfall.
({2/G} can be paid with any two mana or with {G}. This card's mana value is 6.) Until end of turn, target creature gets +4/+4 and gains trample, wither, and "When this creature attacks, target creature blocks it this turn if able." (It deals damage to creatures in the form of -1/-1 counters.)