Golem

Double Strike, Flash, Crushing Jumps (When
this creature enters the battlefield, destroy target
nonland permanent with mana cost less than or
equal to the counters on this creature).
This creature enters the battlefield with X fist
counters.
Whenever this creature attacks, it deals ½ X
damage to any target (equal to fist counters).
When this permanent were to leave the
battlefield, transform it (keeping its counters).