Shelly, the Pursuer

Shelly, the Pursuer has +1/+1 for every two level counters on her. When she has ten level counters, replace her with Shelly, the Obliterator.
When Shelly, the Pursuer deals X damage to any target, where X is her power, put a super counter
on her.
{t}: Remove four super counters from Shelly, the Pursuer. She deals 5 damage divided as you choose between up to 5 targets. Creatures dealt damage
this way cannot attack until your next turn.