Every Soul Orb stack you detonate increases your Movement Speed by 2% for 4s, up to a maximum of 15%.
Level 2
Dark Sight
Rend Soul
Every Soul Charge you detonate generates 2 Ammo.
Level 2
Umbral Gait
Weapon
Your Movement Speed is increased by 40% while any enemy is marked with a Soul Orb stack.
Level 5
Agony
Restore Soul
For each stack of Soul Orb detonated by Rend Soul, your next Restore Soul ignores 5% of Antihealing (excluding Healing disable effects) up to 25% (5 stacks) for up to 10s.