Roar of the Kha is a uncommon Instant card from Mirrodin (MRD), collector number 18. Current market price: $0.26 (foil $0.35), TCGplayer market prices via Scryfall.
Choose one — • Creatures you control get +1/+1 until end of turn. • Untap all creatures you control. Entwine {1}{W} (Choose both if you pay the entwine cost.)