Quest:Wanted: Arcatraz Sentinels

In Wanted: Arcatraz Sentinels, Nether-Stalker Mah'duun wants you to dismantle 5 Arcatraz Sentinels. Return to him in Shattrath's Lower City once that has been accomplished in order to collect the bounty.
 * Arcatraz Sentinel slain (5)

Description
The sentinels within the Arcatraz have gone haywire. The prisoners run rampant and the guards attack those that would help.

Mah'duun hears the speaker on the nether winds. The speaker says to destroy the sentinels

Accomplish this and today's bounty is yours.

Completion
With the sentinels destroyed, perhaps the naaru will ask the Consortium to replace them? Mah'duun does not know and does not care.

You have earned the bounty.

Return again tomorrow and the winds will have whispered once more to Mah'duun.

Reward
You will receive: +  at 70
 * Ethereum Prison Key

Gains
Upon completion of this quest you will gain:
 * 250 reputation with The Sha'tar
 * 250 reputation with The Consortium