Iron Fist, Hero for Hire

Oracle text

Trample Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Power-up — {7}{R}: Iron Fist deals 5 damage divided as you choose among up to five targets. Put five +1/+1 counters on Iron Fist. (Activate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn.)