Cyrus, Arcane Berserker

Haste, trample
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Enrage — Whenever Cyrus, Arcane Berserker
is dealt damage, put two +1/+1 counters on it.
"He's nothing more than primal rage and unbridled
energy incarnate." — Notes from Seranox's journal