In Uchiha Yan's eyes, the moment Orochimaru agreed to trade with him, he already had one foot in the grave.
That was why he had told him everything, both what he should and should not say. If Orochimaru survived even this, then the Tenseigan and Jōgan would surely be born in his hands. Yan would complete his mission and go home. Who would care what happened to the Shinobi World then?
Orochimaru was even greedier than Uchiha Yan had imagined. He wanted to learn the method of immortality without doing anything:
"Yan, could you tell me what exactly counts as balance? Do I need to observe the Tailed Beasts, or something else?"
"Orochimaru!"
Uchiha Yan scoffed. "A greedy snake tries to swallow an elephant. Whether you're a human or a snake, you can't be too greedy.
"If you want something, you need to offer something in exchange. Even children understand something that simple."
"That information alone won't be enough to find this person. You said yourself that he knows Space-Time Ninjutsu. Even if I find him once, I won't find him a second time."
"You only need to find him once and make him use Space-Time Ninjutsu. You don't need to worry about the rest.
"I'll give you another clue for free. This person very likely orchestrated the Three-Tails' death back then. In other words, he's either in Kusagakure or Kirigakure."
"The Three-Tails' death? Do you mean Kakashi's teammate, Minato's student Rin Nohara?"
"Exactly! Putting the Three-Tails inside the Fourth Hokage's student and trying to make her blow herself up in Konoha-that looks like idiocy no matter how you look at it.
"Never mind Lady Kushina, a ninja from a clan of sealing specialists. The Fourth Hokage's Sealing Jutsu alone would have been enough to seal the Three-Tails, giving Konoha