Sulfiir, Ironis's Chosen

First strike
Sulfir, Ironis's Chosen enters the battlefield with X +1/+1 counters on it.
{w}{w}, {t}, Remove a +1/+1 counter from Sulfiir, Ironis's Chosen: Destroy target attacking creature an opponent controls with power greater than the number of +1/+1 counters on Sulfiir.