Orbs

Orbs are used to power up heroes by increasing its stats. There are 4 color frames of orbs-- Grey, Green, Blue and Purple. Each frame varies in the number of orb sets to complete the ring, and when a new frame is reached, a slot for each the accessories and weapons is unlocked. When a set is complete, the hero can be upgraded to increase the base stats of the hero. All heroes have a total of 12 sets of orbs.