Treasure Chests are a way to try your luck to get random rewards, or rare, epic and even legendary Cosmetic Items. The treasure chest menu can be accessed from the in-game store.
To open a chest, simply select the chest you want, and then click the "Open Chest" or "Purchase" button. All Chests except for the Radiant chest can only be opened with 
Crystals. Players can also obtain free Radiant Chest rolls each time they level up their account and when they reach certain champion mastery ranks.
List of Treasure chests
Available
 Radiant Chest
|
 REKT Weapons Chest
|
 Weapon Chest
|
 Champion Skin Chest
|
 Flair Chest
|
 Colossal Chest
|
 Festive Chest
|
 Genie Chest
|
 Code Green Chest
|
 Valentine Chest
|
 Helios Force Chest
|
 Emporium Chest
|
 Overgrown Weapons Chest
|