Use Gemstone to upgrade skills depending on the Hero Avatar skill's category
Assault: Ruby
Tank: Emerald
Support: Topaz
Magic: Sapphire
Ambush: Amethyst
Heal: Moonstone
Gemstone Rarity: Standard/ Quality / Legendary
GemStone can be upgraded by refine system, which uses Beater Token and Raw gemstone.
Character Upgrade
The character can be upgraded by using the same character to upgrade stars with a maximum cap of 5 stars.
Character Set
Each avatar has its story, and the story will come with the set of Hero Avatars. When players collect avatars and complete the set, the player will get a bonus stat.