Quote Originally Posted by mallleable View Post
Its sundering capabilities could also explain the weird pocket dimensions that are present like The Strayborough Deadwalk, and the space that would become Sareel Ja's Vana'diel. They could have been created when Preservation started experimenting on the crystal.
Sareel Ja's Vana'diel isn't a pocket dimension, it's a holodeck. That holodeck's exact location isn't clear, but it's by all evidence somewhere near Yak T'el, he made it out of electrope in/around the Skydeep Cenote. There is the matter of the Vana'diel that he saw when he went through the portal, but that seems to be Actual FFXI Vana'diel, which was known.