The Nexus Key
Binds when picked up
Two HandStaff
145-313 DmgSpeed 3.20
(71.5 damage per second)
+76 Stamina
+52 Intellect
Durability: 120 / 120
Requires Level 70
Equip: Improves spell critical strike rating by 51
Equip: Increases damage and healing done by magical spells and effects by up to 236.

Source: Tempest Keep
Boss: Kael'thas Sunstrider
Drop Rate: Low (15% - 24%)