Seismic Shard this skill steals speed of the enemy and aplies the stealed speed on you (it slows people).
Brutal Strikes this is a pretty awesome skill because it gives you a % of your armor and gives splash demage passively.
Ground Slam it gives aoe demage, the demage of the skill + 70% of your armor so dont forget to activate Brutal strikes to increase your armor and then use ground slam ;D.
Unstoppable Force this skill is a charge and when you reach the point you knock back every one.You can cross walls with this ability, so try to use good.^^