Mjolnir

The Unyielding Hammer
You can find Mjolnir at these locations: Fallen Legion: Sins of an Empire - Unlocked during "The Unyielding Hammer" in Talee.

Fallen Legion: Flames of Rebellion - Unlocked during "The Unyielding Hammer" in the Rynce Crypt.

Link Attack
Whirlwind - Link attack pushes a foe back with a powerful 3-hit combo.

Jotunn Impact
Mjolnir throws his hammer and knocks the foremost enemy to the rear.

Warcry
Unleashes a fierce roar that damages all enemies standing nearby Mjolnir, grants cleave to all melee allies for 10 seconds. [6-hit]

Fallen Legion: Sins of an Empire - Unlocked during "Honor Among Thieves" in Dunswitch, City Center

Fallen Legion: Flames of Rebellion - Unlocked during "The Beast Within" in Vandee, City Center

Whirling Thunder
Smashes the foremost enemy and has a chance to inflict paralysis. [7-hit]

Order Mjolnir
Tenderizer - Attacks reduces a foe's defense by 5%. This bonus stacks up to 3 times.

Enrage - Next attack does 200% damage after a perfect block.

Intimidate - All allies are focused after Mjolnir kills an enemy.

Chaos Mjolnir
Bloodedge - Deal 150% damage, but 10% of each strike damages Mjolnir.

Alert - All AP restored after a perfect block.

Juggernaut - Deal 300% damage and gain haste when Mjolnir has less than 40% HP.