Might of Murasa is a common Instant card from Zendikar Rising (ZNR), collector number 194. Current market price: $0.22 (foil $0.12), TCGplayer market prices via Scryfall.
Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.) Target creature gets +3/+3 until end of turn. If this spell was kicked, that creature gets +5/+5 until end of turn instead.