Chakra Storage Seal

Creation
After years of studying within the confines of the Senju Grand Library, learning the art of sealing and other chakra forms, Koji was able to create a seal that enables him to store chakra from other users within their body and use whenever the user's chakra levels were low. Koji exactly has seven of these seals on his body.

The seal puts Koji's chakra levels on par with a user with a Bijuu within their body.

Usage
Stores chakra into one single seal, the chakra given to the Koji by another. The seal is activated by Koji usually when his chakra levels have dropped, the stored chakra refilling the bar. However once using the seal with the chakra inside, the recreation of one seal takes exactly six months because of how complex the seal itself is. The refill of chakra to the seal takes even more time due to finding another who wishes to give chakra away.

Warning
Koji is the sole creator of the seal, no other user could obtain the knowledge of the seal unless Koji personally told and trained those who claim to have it. With that said, any user beside Koji who claims to have Chakra Storage Seal without permission will be voided and ignored from using the seal.