Atlas, Titan of Stone

Trample
Whenever a creature you don't control dies, put
a +1/+1 counter on Atlas.
Whenever Atlas attacks for the first time each
turn, you may remove 5 +1/+1 counters from it.
If you do, untap all creatures you control. After
this phase, there is an additional combat phase.
Your opponents can't cast spells during your
combat phases.