Onslaught

Onslaught is a Weapon skill, found in the Two Handed Skill line.

Onslaught
150 Ultimate 0,4s Cast Target: Enemy Base Skill: Berserker Strike
Strike at an enemy with a vicious blow, dealing 3485 Physical Damage to them and all nearby enemies. This attack ignores the target's Resistance and grants you Physical and Spell Penetration for your Direct Damage attacks equal to 100% of the amount ignored from the initial target for 5 seconds.

Onslaught is a morph of the Berserker Strike base skill. The other morph is Berserker Rage.