Savage Beating is a rare Instant card from Darksteel (DST), collector number 67. Current market price: $9.72 (foil $21.50), TCGplayer market prices via Scryfall.
Cast this spell only during combat on your turn. Choose one — • Creatures you control gain double strike until end of turn. • Untap all creatures you control. After this phase, there is an additional combat phase. Entwine {1}{R} (Choose both if you pay the entwine cost.)