Devotion

Devotion is a prestige system in.

Description
When players sacrifice (XP) to the Voices, they increase their devotion.

From the December Update,

There are five levels of Devotion:

Rewards
A shirt is awarded for each new devotion level obtained as well as a new card design that sits behind the player's major power icon. The color of the shirt design and card icon changes between levels (white, green, blue, purple, and gold) with the design of the pattern becoming more complex and ornate with each level.