What is the Vortex Meter?

Each sacrifice builds up the Vortex Meter, which is represented by the purple inner circle around the sacrifice pool.

Bigger and better Sacrifices will fill the Vortex even more quickly. When the Vortex reaches its peak, you’ll earn Alchemist Soul Fragments + 10 bonus rewards for that sacrifice, pulled from a reward pool of Rare Gun/Assassin Souls, Skill Shards, and Legendary Souls!