There are many Ethereum Stasis Chambers located in Blade's Edge Mountains north of Gruul's Lair. They can be opened using a [Ethereum Stasis Chamber Key].
Opening the chamber spawns a random level 70 elite mob. Each mob spawned has a chance to drop [Mark of the Nexus-King] which is required for 
[70G] The Mark of the Nexus-King. The mobs also have a high chance of dropping the BoP blues listed.
Known Mobs spawned
- Matron Li-sahar
- Can drop BoP [Windchanneller's Mantle] (Cloth shoulders with random enchant)
- Solus the Eternal
- Can drop BoP [Skystalker's Shoulders] (Leather shoulders with random enchant)
- Gorgolon the All-seeing
- Can drop BoP [Mistshroud Shoulders] (Mail shoulders with random enchant)
- King Dorfbruiser
- Can drop BoP [Slatesteel Shoulders] (Plate shoulders with random enchant)
- Trelopades
- Can drop BoP [Demonic Bulwark] (Shield with random enchant)
Pre-Requisites[]
Before being able to open these chambers, you must have complete the quest [70G] Stasis Chambers of Bash'ir which uses [Ethereum Key Tablet - Alpha] to open Stasis Chamber Alpha.