JJK: Tengen

You can see Aizen glancing at a particular direction before out of nowhere he disappeared, leaving megumi with the lifless people inside the chrono stasis

Looking at where Aizen went, we can see him in front of a disfigured human who looks intimidated by Aizen, who appears in front of him suddenly. Before he could say anything, Aizen said, "It's an honor to meet you, master Tengen."

To which Tengen replied, "It's an honor to meet you as well, what should I call you?".

The response to it was, " I am Aizen Sosuke. "

As this was said, huge amounts of cursed energy started enveloping the place, it was not just huge, it was huge huge even compared to the past sorcerer Tengen had seen through his long life.

Seeing this, Tengen knew he was a threat to be avoided at all costs just by seeing the amount of cursed energy he was outputting. As Tengen was joining his hands and was going to create a barrier as retaliation, he suddenly found his hands missing.

Looking forward he just saw Aizen smiling, after which he noticed his hands inside a blue ball with Greek letters revolving along with some equations, which Tengen assumed to be the cursed technique of Aizen.

Never in his whole life did Tengen encounter such a situation, first he could not keep track of people inside the chamber due to Toji Zenin having no cursed energy and destroying all the structures along with him focusing on the safety of the star plasma vessel. It was something he would never mess up but due to his focus elsewhere, he found himself breaching his barrier.

As Tengen was going to say something, Aizen said, "I want the samples of the past users of limitless technique, the ten shadow technique and everyone else who was supposed to be the pinnacle of strength in past along with their bodies if you do so."

With no idea what Aizen wanted to accomplish with the samples of, Tengen had to give in as he did not see any other way to escape this situation.

As Tengen was about to agree, Aizen said, " Prepare it by next year when I will be coming back here, and I'll keep these hands to myself for the moment."

The next moment, Aizen was nowhere to be seen, just like his hands.