Grox, Gruul'gari Warchief

Grox, Gruul'gari Warchief can't be countered.
Haste, reach, stampede, trample, decompose 9
When you cast Grox, Gruul'gari Warchief, create X 2/2 black Zombies creature tokens with decompose.
Grox doesn't untap during your untap step.
Sacrifice three creatures: Untap Grox. Activate this ability only any time you could cast a sorcery.
"His footsteps are the drums of doom."