Carrie, Queen of Prom

Whenever Carrie is dealt damage, put that many destruction counters on it.
At the beginning of your end step, if Carrie has
4 or more destruction counters on it, destroy all
other creatures, put three +1/+1 counters on
Carrie, then remove all destruction counters
from Carrie.
-------------------------------------------------------------
In the sudden, brief silence, she heard something
within her turn over. Perhaps only her soul.