Sometimes violent earthquakes, hurtling boulders, and unseasonable dust storms are wrongly attributed to the Roil.

Terra Stomper

This spell can't be countered.
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Magic Origins

Terra Stomper can't be countered.
Trample (This creature can deal excess combat damage to defending player or planeswalker while attacking.)

Magic Online Promos

Its footfalls cause violent earthquakes, hurtling boulders, and unseasonable dust storms.

Magic 2015

Terra Stomper can't be countered.
Trample (If this creature would assign enough damage to its blockers to destroy them, you may have it assign the rest of its damage to defending player or planeswalker.)

Zendikar Promos

Zendikar

Terra Stomper can't be countered.
Trample

Terra Stomper can be targeted by spells that try to counter it (such as Cancel). Those spells will resolve, but the part of their effect that would counter Terra Stomper won’t do anything. Any other effects those spells have will work as normal.