Universe 7, Earth, Kami's Lookout, inside the Hyperbolic Time Chamber.
Son Goten was performing a ritual to draw out Trunks's inner potential.
This was the very ritual Old Kai had once used to increase Son Goten's strength.
Over the past two and a half years, Son Goten had used the power of the Dark Dragon Balls to awaken some of Trunks's potential, greatly increasing his strength.
"Goten, does this ritual have to take a whole day?"
Trunks asked as he watched Son Goten wave his arms around.
"Yeah!"
Son Goten nodded.
"All right, then!"
Kaioshin Realm.
Old Kai was currently watching what was happening inside the Hyperbolic Time Chamber through a crystal ball.
"That brat Goten actually learned my ritual for helping others surpass their limits after I increased his strength!"
"Great Ancestor, not only that, but he also learned our Supreme Kais' Instant Transmission!"
East Kaioshin said.
Kibito said, "Yeah, so we absolutely can't use anything else in front of Son Goten, or he'll learn that too!"
One day outside was equivalent to a year inside the Hyperbolic Time Chamber.
Four minutes later.
Son Goten successfully completed the ritual.
"All right, Trunks. Try releasing your ki now!"
Trunks nodded.
"Hah!"
With a loud shout, an astonishingly powerful aura erupted from Trunks's body and spread in every direction.
Since the two were still inside the Hyperbolic Time Chamber, Piccolo and the others could not sense Trunks's aura.
"So... so powerful!"
Trunks looked at his hands, hardly able to believe it.
Son Goten nodded.
"Then shall we go out now?"
"Okay!"
Trunks nodded.
With that, the two immediately left the Hyperbolic Time Chamber.
Kami's Lookout.
Gohan was standing at the very front of the lookout with Dende, Mr. Popo, and Piccolo.
Suddenly, he sensed Son Goten's and Trunks's ki.
Dende