Kushina Uzumaki had always had enormous Chakra reserves. After receiving the Nutrient Serum and consuming a Ten-Tails Chakra Pill, she had reached the level of a Chakraton.
Her own Chakra alone was at least on par with Hashirama Senju's back then. With the Nine-Tails' Chakra added to it, she had plenty of power to spare.
Even after losing so much Chakra, Kushina would recover before long.
"Kurama, I need more of your Chakra!" Kushina shouted into the Sealing Space.
If her own strength was not enough, she would have to draw more power from Kurama.
Years ago, Kushina had collected Chakra from the other eight Tailed Beasts, though she had never known how to use it all.
That was fine. Kurama only needed to know how.
"Don't worry! Leave the rest to me!" Kurama clapped his hands inside Kushina. Chakra from all Nine Tailed Beasts appeared on the nine tails behind him.
Kurama temporarily fused their Chakra and passed it to Kushina.
Golden Chakra flared around Kushina once more. This time, unlike in Sage Fox Mode, nine Truth-Seeking Orbs appeared behind her.
Kushina Uzumaki had entered Six Paths Sage Mode!
"Kushina!" A smile touched Uchiha Mikoto's lips. As she had thought, Kushina might not have undergone Bloodline Reversion, but she wielded the Nine-Tails' power and had gathered the power of all Nine Tailed Beasts. She had also received the Nutrient Serum and eaten a Ten-Tails Chakra Pill. There was no way her power was that simple.
With Kushina's help, taking on Urashiki Otsutsuki would be much easier.
What Mikoto did not know was that she and Kushina now resembled Naruto Uzumaki and Sasuke Uchiha facing Kaguya Ōtsutsuki in the final battle—except that neither of them had the so-called Six Paths Yin-Yang Power.
Urashiki's strength, however, fell far short of Kaguya's.