Frost Scythe

Each enemy hit increases your attack speed by 1% for 5 seconds. Max 15 stacks.

Grim Scythe's damage turns into Cold.

Unlocked at level 45

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

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

Metabolism

Provides an additional charge but doubles the health cost.

Unlocked at level 60

Plaguelands

Enemies in Land of the Dead suffer 100% weapon damage as Poison each second, up to a maximum of 10,000% weapon damage total.

Unlocked at level 48

Harvest of Anguish

Bone Armor also increases your movement speed by 1% for each enemy hit.

Bone Armor's damage is turned into Cold.

Unlocked at level 48