Flaming Aetherborn

Vanishing X
FA’s power/toughness is equal to the number of vanishing counters on it.
Remove 1 vanishing counter: deal damage equal to FA’s power to target creature. Activate only once per turn
As long as FA’s power is 5 or more, FA has lifelink
When a creature dealt damage by FA dies, put a 2 vanishing counter on FA