Phoenix Heart Creation

Devoid (This card has no color)
— Flying, haste
Phoenix Heart Creation enters the battlefield
with X flame counters. At the beginning of your
upkeep put a flame counter on it.
—This creature's power is equal to the number
of flame counters on it.
—{line}Whenever this creature dies, it deals X
damage target player. Return it to your hand
at the beginning of your next endstep.