Kagami was very surprised by the improvement brought by the fusion of the Aizen template, but he didn't study it in depth just yet. The midwife had already brought the baby out. This power was now his, and it wasn't going anywhere. He could study it later. Right now, he needed to check on his child and Tsunade.
Kagami took the baby from the midwife's hands and came to Tsunade's side. "Thank you for your hard work, Tsunade," he said gently, handing her the child. Because Tsunade herself possessed the Creation Rebirth technique, she was still in good condition, not as weak as Suzune and the others had been.
After Tsunade took the child, a maternal glow appeared on her face. She looked at the baby in her arms tenderly, her eyes full of doting love. Then she looked up at Kagami and said with a smile, "Let's give the child a name."
"Mmm," Kagami responded softly. "I've thought about it. Let's call him Aizen. Uchiha Aizen." Tsunade nodded in agreement.
After naming the child, Kagami reached out and held Tsunade's hand. "You just gave birth and consumed a lot of energy and chakra. Let me help you recover." He then performed his reversal technique, quickly restoring Tsunade's chakra and vitality. With the added boost of his technique, Tsunade recovered to her peak condition in just a few minutes, her face becoming rosy again.
Seeing that she didn't look tired at all, Kagami didn't mention letting her rest. He handed the child back to her and went to send the midwife home.
After doing all this, Kagami finally had some free time to begin to feel this new power in detail. After a brief period of familiarization, he fully mastered Aizen's abilities. The tenfold amplification of the Aizen template had brought his soul strength to a terrifying level. If he were to face the ninja coalition army again, he wouldn't even need to lift a finger; he could crush them into paste just by releasing his spiritual pressure. Even their souls would be reduced to ash.
He also discovered that because spiritual pressure was the power of the soul, any attacks he launched with it would directly assault the soul, bypassing ordinary physical defenses. Only a defense of equal soul power could withstand his attacks, and with his terrifying spiritual pressure, no one in the ninja world could match him. Not even the Sage of Six Paths.
With his current spiritual pressure, if he unleashed his strongest Kido attack with all his strength, he could completely destroy the entire moon with a single blow. While Aizen was powerful, his Zanpakuto wasn't an attack-type, so the bonus to his attack power was minimal. His Kido was also very powerful, but its destructive power and range were weaker than some of the most powerful attack-type Zanpakuto. If he had fused with a template like Yamamoto Genryusai Shigekuni's, he could probably destroy the entire planet. Still, being able to destroy the moon was a testament to Aizen's terrifying talent.
Although the Sage of Six Paths had once created the moon with his Six Paths Planetary Devastation, that didn't mean he could withstand the power to destroy it. Even Toneri Otsutsuki, who could cut the moon in half with his Golden Wheel Reincarnation Explosion, couldn't compare to the power of complete destruction.
Thinking of Toneri's Tenseigan brought him back to Black Zetsu's search for a path to the moon. Almost ten months had passed, and he still hadn't found the secret passage. This made Kagami wonder if the Sage of Six Paths had hidden the entrance. Otherwise, with Black Zetsu's abilities, he should have found some clue by now.
But it didn't matter. He now had the ability to go to the moon himself. He could use Yamato to open a space channel directly there. He had been busy accompanying his pregnant wives, but once Samui and Konan gave birth, he would definitely go.
Besides Kaguya, there was also a huge Tenseigan on the moon. If he could absorb its pupil power, perhaps he could upgrade both of his Sharingan to the Rinnegan. No, maybe even to the Tenseigan. After all, it was the power of the Tenseigan, so it wouldn't be surprising if his eyes evolved into that after absorption.
The Uchiha and Hyuga clans both had Otsutsuki blood, so it was possible for an Uchiha to awaken the Tenseigan, however small the chance. The bloodlines of both clans were incomplete, which was why they could only awaken the Sharingan and Byakugan respectively. Otherwise, they could possess both, like Kaguya. Of course, it could also be due to mutated dominant and recessive genes.
Kagami remembered that in the anime, Hagoromo Otsutsuki also initially had the Byakugan before awakening the Sharingan, which eventually transformed into the Rinnegan. His younger brother, Hamura, did not have this experience. This was likely why their descendants, though of the same bloodline, awakened two different eyes. But in essence, the eyes of both clans were the same. If his guess was correct, then an Uchiha could indeed awaken the Tenseigan.