Landslide summons tiny Rock Elementals to help him, it is easiest to ignore them and focus on killing Landslide. When Landslide has fallen, so too will his minions.
Other abilities include a Knock Away effect and a Trample, which inflicts damage to the main target and to nearby enemies.
Patches and hotfixes
Patch 1.2.0 (18-Dec-2004): Added