Hillside Stomper

Trample
As you cast Hillside Stomper, after you are done activating mana abilities you may tap X untapped lands you control. Hillside Stomper enters the battlefield with X +1/+1 counters on it. Lands tapped this way do not untap during your next untap phase.
"RRUUUN!" - Olaf Youngblood,
Captain of the Guard, last words