Choose This One (version 2)

Flash Enchant creature Whenever enchanted creature is dealt damage, its controller loses that much life.

Sacrifice this creature: You gain life equal to the life you've lost this turn. (Damage causes loss of life.)

As an additional cost to cast this spell, pay X life. Fire Covenant deals X damage divided as you choose among any number of target creatures.

Whenever you gain life, target opponent loses that much life.