Aside from the uncertainty of the financial costs caused by the difficulty of cloning, there was another issue that concerned Hyuga Kagami about using the First Hokage Cells: the strength of the Yang Release clone.
Yes, its strength!
But he was not worried that it would be too weak. On the contrary, he feared that the Yang Release clone fused with the First Hokage Cells would undergo an unexpected mutation, just like the previous Wind Release clone.
For the Bloodline Fusion Ritual, clones of different attributes were not simply better the stronger they were.
During the ritual, the chakras of the seven attributes—Yin, Yang, and the Five Elements—had to achieve a delicate balance before the final nature fusion could be completed and united as one.
It could be said that, aside from the Yin Release original body serving as the main body being allowed to be slightly stronger by half a tier, the strength of the other six clones had to be strictly kept within a certain range. The previous Wind Release clone had actually already exceeded the limit somewhat. This was why Hyuga Kagami had needed to turn around and further strengthen the already-developed Water Clone Technique.
Balance was the key!
Through his previous cloning experience with the five clones of Water, Fire, Wind, Earth, and Lightning, Hyuga Kagami had established a model for predicting clone strength.
Using that model to evaluate the situation, he could easily reach a conclusion.
Once the First Hokage Cells were used and achieved perfect cellular fusion like the previous five clones, there would be an extremely high probability that the cloned Yang Release clone would exceed the acceptable strength limit!
The primary cause of this outcome was none other than the union of Yin and Yang.
As a member of the Hyuga Clan