Grab the Reins is a uncommon Instant card from Commander 2016 (C16), collector number 126. Current market price: $0.25, 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.)