Crystallization

Each enemy hit has their attack speed reduced by 20% and your attack speed is increased by 3% for 3 seconds stacking up to 10 times.

Bone Spear's damage turns into Cold.

Unlocked at level 25

Skeleton Archer

Raise a Skeleton Archer that deals 400% weapon damage as Cold.

Skeleton Archers increase your attack speed by 3% for 5 seconds each time they deal damage. Max 10 stacks.

Unlocked at level 19

Ice Golem

Active: Command the Golem to launch an icy blast at the targeted location, freezing enemies for 3 seconds and increasing their chance to be critically struck by 10% for 10 seconds.

Command Golem's damage turns into Cold.

Unlocked at level 24

Aura of Frailty

Becomes an aura that curses all enemies within 15 yards.

The range of this effect is increased by 50% of your gold pickup radius.

Unlocked at level 39

Devouring Aura

Becomes an aura that consumes all corpses within 15 yards to restore 11 Essence per corpse.

The range of this effect is increased by 50% of your gold pickup radius.

Unlocked at level 38

Blood and Bone

Now also creates a Simulacrum of Bone, but the duration is reduced to 10 seconds.

Unlocked at level 69