Grab the Reins is a uncommon Instant card from Mirrodin (MRD), collector number 95. Current market price: $0.36 (foil $3.69), TCGplayer market prices via Scryfall.
Choose one — • Until end of turn, you gain control of target creature and it gains haste. • Sacrifice a creature. Grab the Reins deals damage equal to that creature's power to any target. Entwine {2}{R} (Choose both if you pay the entwine cost.)