After Zou Hyuga entered the spatial vortex, Yomotsu Hirasaka closed behind him.
A few seconds later, the First Hokage arrived in the hall, just in time to see Zou Hyuga vanish.
Using Wood Release to stop the rock overhead from collapsing, the First Hokage and the others wore grave expressions. They had heard the sounds of battle and, after waiting patiently for a long time, had decided to investigate.
Tobirama's Shadow Clone said, "I sensed my true body's chakra just now. They must have gone to an alternate dimension somewhere outside the shinobi world."
The First Hokage asked anxiously, "Can we use Flying Thunder God to get there?"
"No." Tobirama shook his head.
Although Flying Thunder God was a Space-Time Ninjutsu that allowed movement regardless of distance, it required both locations to be within the same dimension. It could not move between dimensions.
The Summoning Technique was an exception. It was a Space-Time Ninjutsu in the truest sense.
But the faint connection between a Shadow Clone and its true body was not enough to perform the Summoning Technique. Nor could this fragile Shadow Clone supply the chakra needed for a jump between dimensions.
Hearing this, the First Hokage sighed. "It looks like we can only do as he said and inform that Uchiha girl."
Tobirama, however, had considered another possibility. "Perhaps we can obtain information from the prisoner."
Before long, the two reached the surface and looked at Amado, who was being guarded by the others.
Orochimaru flicked his tongue out, glanced at the First Hokage and Tobirama, and said, "First, Second, we've already obtained quite a bit of information through interrogation. Has the leader still not dealt with the enemy?"
"They went to fight in an alternate dimension." Despite his distaste for Orochimaru, Tobirama still shared the information.
"It