The quest Akama leads the player to finally meet the elusive Ashtongue Deathsworn leader.
Speak to Akama inside the hidden chamber in the Warden's Cage.
Jump in the pool of water at the end of the hall. At the bottom of the pool is a short tunnel that leads to a hidden section. You can find near the water at the other end of the tunnel.
After you talk to Akama and complete this quest, a short scripted event will happen. Several demons appear and Akama will "kill" you in order to preserve the fiction that he is on Illidan's side. Once the event is over, Akama will bring you back to life.
You've proven what side you're on. I will reveal to you our leader's hideout.
Follow the halls beyond; there will be an underground passage hidden by stagnant water on your right.
I must warn you, <name>. You are not to speak to anyone of what you see there.