The fusion of 'Susanoo Tomoshibi' cannot guarantee that no dojutsu will be lost, but the strongest dojutsu should be retained. So once Shinji uses 'Susanoo Tomoshibi' to fuse these three pairs of eyes, 'Takamimusubi' is highly likely to be retained. As for 'Cinnabar Panacea' and 'Ama-no-Habaya', it's hard to say.
Shinji evaluated that for him right now, the most important thing was actually the pupil power amplification brought by completing the chakra characteristics, that is, the pupil power increase obtained simply through subjugation. Dojutsu were just unexpected bonuses; even if one or two were lost, it wouldn't matter much.
"As long as 'Takamimusubi' can be kept in the end, it's enough..."
If he had to choose among the three dojutsu, Shinji's first choice would naturally be 'Takamimusubi' which could improve chakra intensity.
'Cinnabar Panacea' was quite practical at the 'Six Paths Level' and could be used as a supplementary means, but at Shinji's level, the effect was limited because the combat consumption of a 'Kekkei Mora' could not be replenished by one or two chakra pills.
As for 'Ama-no-Habaya', for Shinji who possessed 'Golden Wheel Reincarnation Explosion' and 'Sword of Nunoboko', it was even less useful.
Looking at all weapons materialized from chakra, 'Golden Wheel Reincarnation Explosion' was still Shinji's first choice!
This was mainly because 'Golden Wheel Reincarnation Explosion' was strongly correlated with Shinji's chakra quality, and this jutsu itself was transformed and driven by 'Truth-Seeking Balls'. In terms of the level of chakra utilization, it far surpassed Kinshiki's 'Ama-no-Habaya'.
After weighing the gains and losses, Shinji restrained his mind and prepared for the fusion.
All eyes on 'Susanoo' closed, and the pupil power of 'Susanoo Tomoshibi' rippled back and forth in different eye sockets.
"Hah!"
With a light shout from Shinji, the fusion officially began.
First fused were Momoshiki's Byakugan and Red Rinnegan. Perhaps because both originated from Momoshiki's body, the fusion was very fast, completed in just a blink of an eye, and the Red Rinnegan instantly changed into Golden Rinnegan.
Shinji was stunned for a moment.
He originally thought he had to fuse Kinshiki's Byakugan to obtain a pair of Golden Rinnegan. Unexpectedly, after fusing Momoshiki's Byakugan with the Red Rinnegan, he smoothly obtained the Golden Rinnegan.
After hesitating slightly, Shinji decided to follow the original plan and fuse Kinshiki's Byakugan into this freshly baked pair of Golden Rinnegan as well.
Because leaving a separate pair of Kinshiki's Byakugan was actually not very meaningful for the current Shinji. Leaving it would be a waste, and choosing to subjugate it would occupy a pair of eye sockets of 'Susanoo Tomoshibi'. So he thought of trying to see if he could further strengthen this pair of Golden Rinnegan through fusion.
Pupil power continued to be urged, pouring endlessly into 'Susanoo Tomoshibi'. The two pairs of eye sockets containing the Golden Rinnegan and Byakugan began to intertwine and overlap.
However, this fusion was much more strenuous than the previous one.
Shinji's brows furrowed slightly, and a layer of fine sweat oozed from his forehead.
"Something's wrong!"
His heart drummed a little.
A massive amount of pupil power poured into 'Susanoo Tomoshibi'. Reasonably speaking, fusing Golden Rinnegan and Byakugan shouldn't be difficult. But for some reason, these two pairs of eyes just couldn't complete the final fusion, as if there was some huge obstacle in between.
The more it was like this, the less Shinji could give up!
Because there was almost no situation of fusion failure in 'Susanoo Tomoshibi', at most there would be no obvious effect improvement after fusion. And if it were like that, the fusion wouldn't be too strenuous. The only situation that would make fusion extremely difficult was the mutation of the dojutsu Bloodline Limit.
Just like when Shinji fused the Ketsuryugan and Hogan back then, mutating into the 'Koryugan' that had never appeared in the shinobi world.
...
As time passed, the expression on Shinji's face became increasingly grave.
The fusion of Momoshiki's Golden Rinnegan and Kinshiki's Byakugan was unexpectedly difficult. With Shinji's current abundant pupil power, nearly one-third was about to be consumed.
Since achieving 'Kekkei Mora', this was Shinji's largest pupil power consumption besides fighting the Hegemon.
Honestly speaking, at this point, Shinji vaguely felt like riding a tiger; it was hard to get off.
This was mainly because his current pupil power was really too strong. Don't look at just one-third being invested, but this was already a very terrifying value. He was somewhat worried that if he continued like this, he might really cause a fusion failure, simultaneously destroying two pairs of eyes in an unfortunate event.
"If I continue, once successful, there might be unexpected gains! But if I fail, maybe neither pair of eyes can be kept!"
Shinji had to make a choice again.
Perhaps because he was now rich and powerful enough, after pondering for a moment, his desire for exploration still exceeded his concern for gains and losses, prompting him to make up his mind to continue the fusion.
With his mind made up, he naturally hesitated no more. Since one-third of the pupil power was not enough to complete the fusion, he simply poured all the remaining pupil power into 'Susanoo Tomoshibi' all at once. Either succeed or lose!
Whoosh...
With the infusion of all Shinji's pupil power, the two pairs of overlapping, intertwining, yet mutually repelling and resisting eye sockets finally completely overlapped under an unquestionable huge force.
There was no earth-shattering chakra fluctuation, nor any shocking light and shadow flashing. At the moment the two pairs of eye sockets overlapped, the fusion of 'Susanoo Tomoshibi' was completed smoothly and naturally.
"Phew..."
Shinji gently exhaled a breath of turbid air.
Although he made up his mind to go forward just now, after the fusion succeeded, he still felt a few points of lingering fear deep in his heart.
If there was any mistake in this fusion, he would have lost all three pairs of eyes from Momoshiki and Kinshiki. For him who wanted to complete the chakra characteristics, this loss was enough to make his heart ache for a while.
Fortunately, everything went smoothly, and the fusion was finally completed.
Breathing a slight sigh of relief, Shinji hurriedly examined the pair of eyes obtained after fusion.
"This!?"
When he saw clearly what the pair of eyes looked like after fusion, even Shinji, who was accustomed to storms, couldn't help but be stunned.
In his expectation, the fusion of Momoshiki's Golden Rinnegan and Kinshiki's Byakugan should most likely result in a pair of golden 'Six Tomoe Rinnegan'. Because whether it was him, or Karin, Hikari, Sasuke, the continued advancement of their Rinnegan was manifested through the increase in the number of tomoe.
Unexpectedly, with Momoshiki and Kinshiki, there was a different path of advancement. The fusion of Golden Rinnegan and Byakugan not only didn't produce any tomoe, but even the signature concentric circle patterns of the Rinnegan disappeared, turning into a pair of pure Golden Byakugan...