Increase the Radius of Swarm by 8%, but increase its cost by {scale=3|3}%.
Level 4
Enriched Blood
Swarm
Increase the damage and Healing of Swarm by 8%, but reduce its duration by {scale=0.35|0.35}s.
Level 2
Waning Moon
Blood Hex
Reduce the Blood cost of Swarm by 5% while an ally is marked by Blood Hex.
Level 1
Sharpened Slaughter
Weapon
Increase Projectile Speed by 50%, but set your maximum Ammo to 2.
Level 5
Sanguine Pact
Death Wings
Reduce the Cooldown of Blood Hex by 1.5s after activating Death Wings.
Level 3
Maelstrom of Carnage
Swarm
Swarm is now cast on yourself and follows you around instead of being placed on the ground, its ability cost is decreased by 25%, and its radius is increased by 30%.