As for Teyvat, or rather Genshin, Shen Fei had always been curious whether it was on the tree or in the sea. Now, he had finally confirmed it. From this, he could infer that the power of the Abyss over there probably belonged to the Sea of Quanta. Naturally, Shen Fei wanted to visit Teyvat someday. After all, there were quite a few familiar faces there.
The reason he was not going now was that it would probably be difficult to return anytime soon. Marvel could face Thanos at any moment, so he planned to go only after dealing with Thanos. Once Thanos was gone, he could finally relax for a while. A large part of his pursuit of power was driven by the threat of Thanos.
"It's not easy for a World Bubble to reattach itself to the tree. But this time, I can help them move without much trouble."
Shen Fei had another reason for wanting to visit Teyvat: his current strength was sufficient to help them relocate. Moving an entire planet's population was extremely difficult, but that was before he entered the Devouring World. In the Devouring World, relocating a planet's people was easy. In the original work, when Luo Feng was carrying out missions, he used a World Ring to collect ten billion people in one go.
World Bubbles in the Sea of Quanta could return to the Imaginary Tree, but achieving that was incredibly difficult. The World Bubble inside Durandal had succeeded because it was small, much like the Candy House of the Shoggoth race. It could connect to the Imaginary Tree whenever it wished and leave whenever it wished.
But Teyvat was not small. At the very least, it was planetary in scale. Reconnecting something of that magnitude to the Imaginary Tree would not