I'm not a expert on dimensions, but I do have some basic understanding, and if I do have some misconceptions, feel free to address it. Shouldn't Mori fulfill the 4D requirement, considering he existed at 3 separate places in simultaneously? The past, present and future once he achieved Nirvana. He wasn't just time traveling, it was actual omnipresence since he simultaneously existed at different points in time, as well as three difference spaces which in why what happened in chapter 508 and 568 made everyone realize that entire instance we witnessed was a paradox.
When Mori touched the tablet, he was in 3 places at once, 2 of them were separate points in time, and one was in Nirvana.
In chapter 508, we saw an obscure figure, that Bonghram reacted to, while Mori in real time was training with Ogre (
way before he even arrived to fight Mubong the second time)
We later learned that obscure figure Bonghram saw, was actually ascended Mori from nirvana in chapter 568 (
60 chapters later)
So Mori simultaneously existed in:
1)
The present with Ahan and baby Taejin,
2)
The past when he projected his avatar and affected it (a paradox)
3)
In a different dimension, aka Nirvana with Xuanzang
All three of the scans above happened simultaneously.
So we have Mori existing in 3 different places at once, with two of them being separated points in time, meaning he can exist simultaneously along that axis. 3D beings don't simultaneously exist at various points in time considering they're limited to 3 dimensions, so when it comes to time, they they just exist in the here and now since they can only experience it sequentially. Mori doesn't have that limitation considering he can simultaneously exist along that axis, if that's the case that shouldn't that satisfy the requirement? unless I missed something.