Everlasting Emberknight

First strike, haste, trample
When Everlasting Emberknight enters the battlefield, put X ember counters on it and X +1/+1 counters on it. At the beginning of your end step,
remove two ember counters and two +1/+1 counters
from this card. If you cannot, sacrifice it.
Rekindle — {2}, {t}, Sacrifice another creature: Add
X ember and +1/+1 counters to this card equal to
the sacrificed creature's toughness.