WoW Classic - How to reach the Black Vault in BRD

Описание: How to reach the Black Vault (vault room) in Blackrock Depths
Requires the Shadowforged Key for this shortcut, otherwise you need to go through the arena.
The vault is required for :
farming pre-raid BIS shoulders for mage (drop on Warder Stilgiss)
getting reagents for 3 BRD librams (150 mana/20 RF/125 armor)
rogue gold farming