Warg Tactics is a common Instant card from The Hobbit (HOB), collector number 139. Current market price: $0.21 (foil $0.31), TCGplayer market prices via Scryfall.
Choose one — • Destroy target creature with flying. • Put a +1/+1 counter on target creature you control. It gains trample and hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)