Yavin

Background
Yavin is a half-elf (half-drow) mage living in a tower deep in the Underdark. He is arrogant, unstable, and prone to fits of irrational rage and half baked rants, largely fueled by his frustration of growing up in Drow society and constantly having assassins trying to kill him. His specialty is using control modules to control Hooked Horrors remotely, which he uses as his bodyguards.

Physically, he is a thin man with balding white hair and a neat goatee, with filthy, tattered robes, and his living quarters are filthy, as he appears to be a bit of a hoarder.

Artifacts of Knowledge
Yavin is one of the only mages with an archive of books containing information about the Ur, and nearly everything else. Thousands of books large, Yavin's Library is a disorganized mess of books, that may, or may not contain the secrets of the universe.