Minato and Hiruzen hurried without pause to the coastline of the Land of Whirlpools.
Combining his memories of that year with the map, Hiruzen used the lunar phases and the movement of the tides to reconstruct the approximate location where the coffin had sunk to the seabed.
But the deep-sea water pressure, far beyond what a human could withstand, remained the greatest obstacle to rescuing Kushina!
Minato truly had a genius's mind. He immediately came up with an astonishing solution: use a Rasengan to disrupt the Flow and create a whirlpool leading to the seabed!
But... all the Yin Nine-Tails' chakra had already been extracted to complete Sasuke's Susanoo-Tails!
Minato had been revived through Rinne Rebirth. Although he still retained the power of the Shinigami, that power was a potent mechanism for killing and taking lives, not something that could push his stats to their limits like tailed beast chakra!
To overcome the seawater before him, Minato needed the support of higher stats—and extraordinarily high ones at that!
At that moment, the only thing he could immediately use to boost his stats... was Sage Mode!
Hiss! Orange eye markings appeared in an instant, with horizontal toad pupils at their centers!
Minato leaped into the air, turning upside down!
He thrust his palm hard toward the sea!!!
Whoosh!!! Senjutsu chakra surged together ferociously... forming an incredibly violent Rasengan beneath Minato's palm!
That Rasengan was far more powerful than Jiraiya's Sage Art: Ultra-Big Ball Rasengan, but... it still fell short of Naruto's crowning achievement in the original story, Sage Art: Super-Super-Super-Super-Big Ball Rasengan!
Worried about Kushina's safety, Minato had no attention to spare for naming this heavyweight Rasengan.
For ease of narration, we would temporarily call this sphere—the [Sea-Covering Rasengan].
The instant the Sea-Covering Rasengan took shape, its terrifying thrust sent the