Flash Conscription is a uncommon Instant card from Ravnica: City of Guilds (RAV), collector number 124. Current market price: $0.17 (foil $0.40), TCGplayer market prices via Scryfall.
Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn. If {W} was spent to cast this spell, the creature gains "Whenever this creature deals combat damage, you gain that much life" until end of turn.