The foundation of power in the ninja world was chakra.
Chakra was energy formed by combining spiritual energy and physical energy. The balance between the two was the key to determining one's upper limit.
The Uchiha clan's bodies were far stronger than those of ordinary ninja, allowing them to sustain the eye power output that placed an extreme burden on their mental energy.
But... compared to the bodies of supernatural creatures from other worlds, they were still far too lacking.
Even Muzan could be killed by plenty of people in the ninja world, but in terms of physical strength alone, he still surpassed the vast majority of them.
Not to mention creatures like Akainu and Rayquaza.
Uchiha Sora's will could bear fragments of their abilities, but his body was starting to fail.
To use an easy-to-understand analogy, it was like a bottle of water placed in a freezer. As the liquid froze and expanded, the bottle would crack and burst.
His body could no longer keep up through training alone.
If he did not find a solution, Uchiha Sora would die like Kimimaro, his body unable to withstand the excessive growth of his power.
Everything fate gave had already been marked...
Well, it was not that complicated. It was simply the interest accrued before a debt was repaid.
Rayquaza's and Akainu's trial cards had been forcibly given to him. While increasing Uchiha Sora's power, they were also warning him.
If he could not grow strong enough to repay the debt before the deadline, then these things would burst his body apart.
The platform had reminded him again and again.
Borrowing carried risks. Unless necessary, please do not borrow.
When you could not even repay the interest...
If it happened between lovers, they would most likely go their separate