Since he had not mastered Senjutsu himself, natural energy was harmful rather than beneficial to Hyuga Kagami.
If he absorbed a large amount of it, even his body would inevitably begin to petrify. However, if the natural energy had already fused with chakra—namely, senjutsu chakra—then it could be absorbed and used.
In the original timeline, Madara Uchiha, who likewise had not mastered Senjutsu, had once performed Senjutsu by absorbing the senjutsu chakra from the First Hokage.
Of course, since the senjutsu chakra Hyuga Kagami absorbed had not been created through fusion with his own chakra, its compatibility and efficiency could not compare to his own Tenseigan chakra.
"Stop!"
Seeing Hyuga Kagami casually reach out and begin drawing Haku's chakra, Kimimaro immediately moved to intervene.
Shisui hurriedly stopped Kimimaro and shook his head at him.
Out of trust in Shisui, Kimimaro forcibly suppressed the urge to act, his gaze fixed firmly on Hyuga Kagami.
The heavily injured Sasuke and Deidara nearby also looked tense. They instinctively backed away a little and raised their guard.
Setting aside Hyuga Kagami's attire as the leader of the God Organization, his ability to casually extract Haku's chakra alone instinctively filled Sasuke and Deidara with dread.
Haku, whose senjutsu chakra was being absorbed by Hyuga Kagami, suddenly widened his eyes in shock. A trace of disbelief appeared on his face as he looked at Hyuga Kagami. "You are...!?"
Having once been possessed by Hyuga Kagami through the Soul Descent Technique, and with their chakra now connected, Haku immediately recognized that the mysterious figure wearing a black cloak trimmed in gold and a demon-faced mask was Hyuga Kagami.
"Mm."
Still gazing toward the distant battlefield, Hyuga Kagami did not turn around, merely responding faintly.
After confirming Hyuga Kagami's true identity, the fear in Haku's heart immediately faded.