"Aside from the one under seal in the Fortress, there is one other major rent in it now, between the Opera Epiclese and Poisson on the lake floor," Neuvillette says. "Unlike the ones of which you speak, it can hardly be called a 'spring' - the seawater does not filter into the rest from beneath the ground."

He tips his head slightly, and says, "Under normal circumstances, one might dig for miles beneath Fontaine and never reach the Primordial Sea. It is not entirely inside of Teyvat in the physical plane - it is similar to the Abyss in that one regard. In that vein, I am not entirely certain that time flows in the same way as it does for the outside world."

Certainly, it didn't do so within the pocket Focalors made for herself, overlooking it. That instant was only an instant for everyone else, a moment in which the storm surged even as the flood rose in counterpoint, but for Neuvillette... Well, his heart will never truly know how long it was, but it was certainly no instant.