Ascension

Additionally, Ascending Warriors will increase the level cap and enhance their Damage and HP. 

To Ascend, you must have enough shards of that Warrior, which you can collect by opening Mystery Balls at the Ancient Mewchine

Players can ascend each rarity type up to 15 times. Each time you ascend, you will increase by 1 star, and the number of stars will correspond to the stat bonus