Shikaku reminded Tobirama, "Second Hokage, the battle at Hozuki Castle!"
While Minato and the others were searching Rōran for Liao Wu, the Ninja Sect had sent a force of seafaring ninja to attack Hozuki Castle.
Their commander was Yagura, the Fourth Mizukage of the Mist Village. The Three-Tails had gone with him.
Once Liao Wu woke up, he would go to reinforce Hozuki Castle. Yagura and the Three-Tails would be no match for him.
Minato still wanted to take action.
His teacher, Jiraiya, was at Hozuki Castle. He had to go rescue him.
Tobirama stopped him. "Minato, you're exhausted. Stay here and rest! I'll go to Hozuki Castle!"
"I..."
Minato really was utterly exhausted. After just a few words, his head was already spinning.
Seeing this, Tobirama had someone take Minato and Kushina away to rest.
Minato refused. "No, Second Hokage. I have to save my teacher!"
He forced himself to his feet with the last of his strength.
Tobirama felt helpless. He thought it was time he focused on researching ninjutsu to deal with Liao Wu and left the Leaf Village to Minato.
There was no better candidate for Hokage than Minato.
Tobirama promptly issued a series of orders, then activated Flying Thunder God with Minato to head north into the Land of Takigakure.
After Tobirama left, Shikaku discussed ninjutsu development with the Cloud Village ninja.
The command headquarters had proposed a strategic ninjutsu designed for strategic retreats.
Minato and Tobirama's Flying Thunder God teleportation really could save lives at critical moments.
In the past war against Madara, Minato had relied on the Flying Thunder God Technique to survive to the end.
The command headquarters wanted everyone to learn the Flying Thunder God Technique so they could save themselves even in the most desperate battles.
But that was impossible.