Fyrefly IV, Plane Asunder

Fyrefly IV, Plane Asunder's Power is equal to
3 plus the amount of life you have lost this
turn
Whenever this creature attacks, you lose 2 life
At the beginning of your combat step, if you have
lost 5 or more life this turn, this creature attacking instead makes you gain 4 life
Whenever you gain life from this creature, deal X
damage to any player, where X is the amount of life gained this way. Damage dealt this way can not be prevented