Maximum Security Breakout

This quest is automatically offered, from no one in particular, once you turn in Hey There Dalliah. Under [npc=18481]'s portrait:

Be careful, he is very powerful.

and upon completion:

Their capabilities are most unsettling.

As for why two of the rewards are the same, they weren't originally, back when they were rewards from the now replaced [quest=10882].
[item=31747] was originally spell damage, then spell power, and now intellect.
[item=31749] was originally healing, then spell power, and now intellect.

Confirmation that Skyriss is in fact working for the Old Gods, and thus, the Old Gods are a galactic force of chaos, not unique to Azeroth!

I entered as Level 85 mage. You will pick up two quests inside this dungeon. At the end, after you kill the bosses in Stasis Block: Maximum, you will find a small doorway near the doorway from which you entered. Go through this passage which will take you to Stasis Block: Trion. This is where you will complete the quest Maximum Security Breakout. Very pretty zone. Take time later to look at it.

There are a couple of mobs in the beginning but The Protean Horrors almost did me in. They just don't quit. I finally ran through the hall into the next room, then the next small area and killed the ones who followed me. I do not recommend stopping to fight these creepy things. Protean Spawn-slug-things will attack you in the hallways. Just keep on going, easy to follow the trail.

You will pass two sentries before you enter a room with two 4-person mobs. One pats the area. You can pull the patrol into the hallway, if you time it right. After they are dead, look at far side of the room to see the corpse of Udalo. (I hope you can hearth back to Shadowmoon Valley cuz thats where u need to go to complete the quest Seer Udalo.)

Gargantuan Abyssal can be pulled into this area before you go into the next area which has two huge Hellcallers and two huge Sargerons, all Elite 70s, paired, left and right. Can clear one without pulling the other pair unless you have a clone like mine, which started the second fight before I was ready.

Now you will see three more challenges--Unchained Doombringer, Gargantuan Abyssal, & another Unchained Doombringer. Pull each one separately.

And at the far end stands a very wee person...Warden Mellichar, Elite 72. The warden makes a speech before protecting himself with a bubble and sends for help: Phase hunter, Elite 72; then (to our surprise) Millhouse Manastorm, 70 elite, who says he will help. Third the Lightning Waker(?); Fourth Blackwing Drakonar 72 elite. Finally Harbinger Skyriss, a huge grasshopperish-looking guy, for a quest. He splits twice in the fight; I concentrated on the original.

Back to Shadowmoon Valley to finish a very long quest.