Blighted Marrow

Damage is increased by 15% for each enemy Bone Spear passes through.

Bone Spear's damage turns into Poison.

Unlocked at level 7

Bone Pillars

Instead strikes the target and up to two nearby enemies with large bone pillars for 180% weapon damage per second as Poison.

Unlocked at level 13

Potency

Increases your armor by 100% for 2 seconds after casting.

Unlocked at level 34

Enfeeblement

Increase the potency of the movement speed reduction to 100% and decaying to normal potency over 5 seconds.

Unlocked at level 27

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

Reservoir

Your maximum essence is increased by 100% while your Simulacrum is active.

Unlocked at level 63