Pure crystal of feelings is a material used to raise the master rank of 4★ cards and skill level of any rarity of cards. Pure crystals of feeling are obtained by exchanging duplicate 4★ cards in the waiting room.
Raising Master Rank
- For 4★, 1 crystal is required for each master rank. Alternatively, 2000 fragments of feelings can be used instead.
Raising Skill Level
Each crystal provide 2000 exp towards leveling up skills.