This is the premium currency of the game which is primarily used for summoning new heroes, including the chance to pull much coveted SSR characters. They can be bought with real money though the game is generous enough to provide an ample amount of crystals for players who opt not to spend anything.
Expand maximum Hero capacity (5 slots for 10 crystals)
Expand maximum Rune capacity (5 slots for 5 crystals)
Expand maximum Badge capacity (5 slots for 5 crystals)
Purchase certain Costumes (500 crystals)
Upgrade town facilities (instead of Gold)
Exchange for Dungeon Tickets x1 (10 crystals)
Exchange for Dungeon Tickets x10 (90 crystals)
Stamina Potion x1 (10 crystals)
Stamina Potion x10 (90 crystals)
Exchange for Gold
Enhance reward for the Bounty List
Purchase using RMT (real money transaction)
Daily login rewards
Complete Achievements / Missions
Clear specific adventure maps
First time encounters with other players in a Co-op Dungeon
Raising a character to max level for the first time, per tier, as follows:
* 4* - 6 crystals
* 5* - 8 crystals
* 6 - 10 crystals
Arena Tier Rewards
If you opt not to spend anything in the game, at least aim to log in daily and complete various Missions/ Achievements. You’ll be able to save up enough crystals to do a batch summon, preferably during a rate-up event where the appearance rate of certain SSR characters are boosted.