The mage involved is researching a set of books that create a rip in the time-space reality when brought together. He wants them to see if he can create his own pocket dimension. The player is asked to help find the books, which are scattered around in various dungeons and bookstores (just pick any that already exist).
After retrieving the books, the mage does his experiment; the books and he disappear into an interdimensional rift. Daedra, random objects and animals begin filling up the house as reality starts to collapse.
This set might only consist of fairly simple exterior pieces used to spice up deep sea areas; perhaps a few spots in the Inner Sea, but more probably in the Padomaic Ocean. Something more elaborate would also be welcome, though.
It still needs concept art, but I figured I might as well get the ball rolling:
This does two things, the first thing is it replaces "Auridon" topic and mentions with "Moridunon", which was the given name of the secondary island in both Fragments: On Artaeum and Galerion The Mystic as R-Zero pointed out to me on discord. The second simply gives addtopics and more topic linking to Elteryn of Firsthold's various lines.