The Reanimator's Cloak was introduced in patch 15.5 along with the Crypt of Home Dungeon. This nano buffing robe quickly became popular with casting professions trying desperately to get those last few points of nanoskills to cast that next heal, attack, or pet. The Robe starts off at QL100, with a level lock of 75+ to wear, and ends up at QL150 with a level lock of 100. To level the robe all you have to do is right click it, provided you meet the Psychic and Intelligence requirements for the next jump in QL.