A unit can be evolved at max level to increase its rarity. Evolving a unit will require Zeni, and Evolve Materials which can be obtained through Weekly Quests. After evolving a unit, its max level is increased as well.
Evolution Level Requirements
- 1★ to 2★ unit requires Level 10
- 2★ to 3★ unit requires Level 20
- 3★ to 4★ unit requires Level 30
- 4★ to 5★ unit requires Level 50
*Note that your unit's level cannot exceed your current Player Level.
Evolution Confirmation UI