Thalodien told us of your success in disabling Manaforge B'naar. He expects a repeat performance here and asked us to keep an eye out for anyone using a crystal to access the console inside. Overseer Seylanna holds the access crystal, we're sure of it.
Go back in there and finish the operation. No need to be stealthy anymore; get the crystal, begin the shutdown, kill the technicians trying to stop you and get out.
Hurry, it won't be long before Kael's lapdogs sniff us out.