Besmirch is a uncommon Sorcery card from Conspiracy: Take the Crown (CN2), collector number 49. Current market price: $0.36 (foil $2.88), TCGplayer market prices via Scryfall.
Until end of turn, gain control of target creature and it gains haste. Untap and goad that creature. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)