Robe of the Lich

 is an item in.

Properties
The  Robe of the Lich  is the robe worn by the powerful  lich   Gedna Relvel. It allows the user to gain a temporary boost in magical power at the expense of their life force. Though it has very powerful Fortify Magicka enchantments, this is complicated by the fact that it drains 600 health when used, and both effects last for only one second. Use of this robe is inadvisable, and is of better use as one of two required donated artifacts to receive the Dwemer Battle Shield from Torasa Aram as part of the Tribunal main questline.

Location
Can be obtained from Gedna Relvel's Tomb in  Old Mournhold.

Trivia

 * Using this robe will almost always result in death, and so it's main use is to sell it to Torasa Aram  in the  museum for 11,000 gold.