From Diablo Wiki
- Base Skill (Physical)
- Cost: 20 Essence
- Summon a piercing bone projectile that causes 450% weapon damage to all enemies it passes through.
- Crystallization (Cold)
- 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.
- Shatter (Physical)
- Instead of piercing now detonates on the first enemy hit dealing 450% to all enemies within 15 yards.
- Blighted Marrow (Poison)
- Damage is increased by 15% for each enemy Bone Spear passes through.
- Blood Spear (Physical)
- Bone Spear turns into Blood Spear. Damage is increased to 518% weapon damage at the cost of 10% health.
- Teeth (Physical)
- Launches 5 razor sharp teeth that deal 300% weapon damage.