Crystals are a paid currency and one of the primary resources in Future Fight.
They can be used to buy new uniforms and various packages in the store. They can also be used to refresh daily limits in many play modes.
Obtained[]
Daily: 25 if all 5 Daily Challenge are completed.
Weekly: 30 if 30 Daily Challenges are completed.
Monthly Check-In: 100 each on the 10th, 18th and 24th day.
Timeline Battle: Variable amount depending on placement each week. Additionally, one-off rewards for winning Timeline Battles, eg 120 for 3000 wins.
Quests: Obtaining certain amounts of characters at a certain rank, eg. Reach 3* with 30 characters for 30 Crystals.
Character Progression: 20 Crystals for each level 50 character, and 40 for level 60 character.
Friends: Have 50 Facebook friends for a total of 1000 Crystals, and 150 for 50 in-game friends.