New function is in the Exercise tab.
Get Sharingan Orbs in the Unblock tab. You have 1 free spin per day.
Then, you can use Gold for 1 or x10 spins, to get Sharingan orbs and materials to upgrade the stages.
Equip your Sharingan orbs in the first tab and increase the stages to be able to unlock more slots and equip more skills.
The skills will be used by the main character in battle.
By clicking on a Sharingan orb in this function, you can also make Fusion (with other orbs of the same kind) in order to increase the stats and bonuses.