It was perhaps his opponents haste that allowed things to flow in the exact way the Nara originally planned. Gone was the need to waste any movement to follow his orbs in the air. Oh no, the sudden appearance of the lightning was something that allowed his mind to change without consequence. Just as Rusaku chose not to activate his Tenseigan, he would choose not to make the leap, but he would remain running. His intentions of throwing the two water bombs would go off without a hitch.
Unlike Rusaku, the Nara had techniques to increase his processing. But, he must of misread his opponent's capabilities, unaware that he was unable to act so fast with just his Byakugan. With this in mind, his chakra pulsed inside of him to allow him to act upon this new development to proceed with his first action of the post. One by one, in multiple explosions of smoke, the bombs would multiply into a solid 1,000, as the Ninja Tool Shadow Clone Technique was applied to them.
Of course, despite knowing of the lightning, he chose not to stop the lightning from making them impact with three of the bombs. This was because, he had a plan for them all. Even as the bombs exploded in front of him, his bleeding eyes gleamed in a growing sense of mischief, releasing a pulse of energy that stretched for a single mile. Owatatsumi, the technique being used, caused, not just the three in front of him, but the rest of the 997 orbs all around him, the trees behind him and possible the Kamui Puppet's trees ahead of him, to explode as well. The gallons of the water in the area, multiplied by 1,000, but the new number at 93,500,000 gallons in total. Imagine how much it would be if he really did have three like his opponent assumed. This excluded the water he pulled from the wet air, the rain soaked ground and the trees and grass in the area of the pulse. Absolute power over water was given to the Nara and in the Mangekyo Technique's activation, the water would swirl around the Nara with a enormous dragon composed of water stretching up high into the sky.
The size of this dragon would be three quarters (3/4) of a mile in height, despite the fact that its body was taking up perhaps a mile and a quarter (1 1/4) in size. The water that didn't compose of this solid blue dragon stretched as far as two miles (and counting) in a tsunami like manner, just from the fact that the water needed to naturally spread outwards and Rusaku wasn't just going to allow the Tsunami to reach him. Speaking of the water, it would only be moving in a single direction, towards the Nara's opponent.
Lets not forget about the lightning the Otsutsuki managed to gift this monstrosity of a technique. Lightning coursed through the construct, the saltwater managing to conduct the electricity through every milliliter of water. If not every milliliter, than pretty much most of it. With the power of the lightning having been bolstered by the Tenseigan chakra, there wasn't any doubt that it was possible for it.
As for the Nara, he'd continue running forward, nestled inside this large construct of water, untouched by the water/lightning. It was almost as if he was inside a tunnel, except he was more than perfectly capable of seeing outside, using his Mind's Eye to keep his opponent's position on his radar. Seeing as how Owatatsumi was powered by Sage Mode and Devil Release, there was no argument that the water would benefit from this augmentation, especially since it was stated to receive such. The Chakra strain would be severely weakened, leaving him with free reign over the course of the fight with nothing to hold him back from using its full potential.
The best thing about this, he was using natural water, meaning his chakra wasn't inside of it. The only shred of chakra that would be inside of it, was his Hiraishin Marker resting on a piece of bark from one of the trees behind him, speedily heading towards the original Otsutsuki. Speaking of this split, let's transition into this last action. The dragon, upon reaching its apex height in near immediacy, would snap its enormous maw towards the direction of the Tenseigan Cloaked Clone, closing three quarters of the distance in such quick speed, it was like it was the Nara himself (which wasn't far off as it was through the Nara's Hydro-Kinesis). This was but the Dragon's Movement as it would roar out a blast of water from its maw. This blast would be the size of Gyuki's Tailed Beast Ball (Wave Version), containing enough speed and power to eradicate the clone into absolute nothing in a tenth of a second. Again, this wasn't even counting the fact that it was supercharged with the lightning that held the potential to obliterate the human body. While the Nara wouldn't be able to further boost the lightning inside the water, its power alone was more than capable to exponentially bolster the water.
Of course, now, lets get on to the actions of the clone, that being the summoning of one Masane Uchiha. Now, this presented a paradox. The first being that, Rusaku stated that it was a puppet he just recently converted. How was this possible, if the Nara had eaten the same woman many months prior. The number of months was definitely plural, possibly being more than a year, but it was definitely after he received Aurora's Egg, so it was still pretty recent. In fact, he can find out the general date with the inclusion of Steel Release/Chakra Chains/Uzumaki Life Force on his wiki, since that was around the time he consumed the woman in her entirety. The moment he entered the Steel Release was on June 6, 2016, with Chakra Chains and Uzumaki Life Force entering the picture sometime afterwards as the Nara finished processing the implications of his actions. Masane wouldn't be the only person he'd ICly consumed as he did the same with Naruto Uzumaki. Whether the man treated it as an IC death was inconsequential as said implications had only managed to increase his own connection with his Chakra Chains and Uzumaki Life Force. Of course, this was off topic, merely an example of why he didn't believe the Otsutsuki had managed to summon the Uchiha. Even then, it too would hold no importance as the puppet would also be caught in the blast if it didn't manage to get out of the way. Unlike the clone, Masane, puppet or not, did not have the capabilities of dodging something moving at this speed... especially when she was killed by something that was moving significantly slower.
Now, the clone could have been stopped from doing the summoning altogether. That was clearly a possibility. Rusaku let it known that it was clearly time to stop holding back. The question is, would he be able to continue doing the same or would his reluctance cost him his life?