Demons can undergo evolution and raise their ★ rarity by sacrificing other demons with the same ★ rarity, or by using Yata Mirrors.
It is possible to evolve all demons and the highest rarity is of ★6.
※The demon to be evolved must first be at max level.
※After evolving, the rarity of the demon and its max level will increase, but the level of the demon will return to Lv 1.
※Demons used as material for evolving will disappear.