You need to use shackles on him (that will turn him hostile), then you need to drop him to 20% hp and use again the shackle to bind him. After you bring him back (and he will spawn mobs on the way).

His escort is actually a separate quest: https://vanillawowdb.com/?quest=4121"">(Quest #4121).

The quest took about 13minutes total including the 2.5 minutes wait at the beginning where he randomly decides to sit there for a while. His random looking death is actually a minor error in programming from blizzard. High executioner Nuzrak actually uses his battle axe to swing down on him to kill him as he is kneeling but there is 15 feet between them, hence blizzard's foul up.

Quest now gives 350 rep with Orgrimmar.

This quest is utterly miserable unless you're in a group or level 70. The spawns are too fast, there's too many, He doesn't stop walking while you fight and there's no time to rest between elite battles.

Waste of time and resources in my opinion.

Rememeber, if you wiped on the Quest you can do it again by getting back to Kargath and Speak To ""Lexlort"" to get another Shakcle, then get back to ""Grark Lorkrub"" and use it on him, then take him to 30% and here you go :)

ok so here is how we did it lvl 55 pally and lvl 61 pally
After we put the shackles on him he fights us until he get to about 30% where he submits and walks you to outside through anything and everything. (only do the shackle thing once)
About 42,42 (not too far from the door) he starts an ambush from his cronies. ( At this point I advise you to be ahead of him or behind him enough so that you can pick off the cronies 1 at a time.) (We died and luckily i was afk so that my pally buddy resurrected me and I didnt fail the quest but he did since he had to run back to the guy, Im guessing once you get so far away, you fail it.)
After you defeat his cronies, he is gonna walk you around to the Imp who he think will beat you but jus kick their butts quick as you run to keep up to him because he does not stop as you fight anything!
Next he kindly walks you through the dragonkins who have no mercy on you as he walks away and tries to make you die and fail at point 35,49.
Then as he gets to the walkway going up into BRM (Blackrock Mountain) his cronies spawn again (bout 2 elites and 3 lvl 54) as I stated before please be either ahead of him or behind him so that you can give yourself enough space to pick them off 1 by 1.
After you kill them he walks up the walkway going into BRM and about 3 to 4 dragons spawn but they are easy to kill.
Lastly he take you into BRM and nothing more to kill and he will kindly be killed before he can laugh his last laugh!

As 57 druid, feral doesn't seem to be an option for this.
Instead I switched to resto and kept rooting him + hurricane (it doesn't seem to break roots). When you get respawns, use nature's grasp since you're not allowed to root two targets.

As noted above, this can be a very difficult quest to solo. This quest has NOT had the elites removed like in other quests. I was trying to solo this as a L55 feral druid in blues.

First off, if you aren't a class that can solo elites and/or can self heal and/or are well above the level requirement, don't waste your time. The mobs in the stronghold are a pain since there are plenty of groups and pats.

Next, Grark himself has 22K and hits like a truck. You may only need to get him down to 30%, but it is hard. If you manage to get him shackled you now need to get back out of the fortress, past the faster than average respawns. Once outside you can just avoid any mobs he walks though by staying at range and keeping him in sight. That way you don't need to kill everything. For the ambushes just make sure you are at range so you don't get aggro when they pop. (aggro is not automatic)

The first pack is a four corner formation around the escort mob, with 2 elite and 2 non-elite on opposite corners. They pop once you have cleared the fortress area and are near the rocks. You can body pull them individually, or at worst in pairs. At the base of the path up into Blackrock Mountain comes another 2 elite and 2 non-elite combo, but they run in as a pack right up to the escort mob. This poses a problem. I found I was able to kill one, then run and leash the mobs by running in a large circle around the escort mob to keep him in view. (If he 'fades' out because you ran too far away you will fail the quest.) So I went in and killed one, leashed the rest, then killed another etc.

The problem?

The escort mob has a timer, and if you don't kill them fast enough the quest fails. I didn't time it (I should have) but it felt like 3 minutes. I was able to get 3 down and was just engaging the forth when the quest failed and he vanished.

I'm not going to try again for now, I'll leave it a few levels and see how it goes. Perhaps this may help others who want to solo this though. Either bring a friend, or else be ready to face what this quest has to dish out.

This quest doesn't mention anything about bringing a party as it well should. I am attempting this on my 55 resto druid. Dpsing him the first couple times in his room took so long the adds respawned on top of me. After that I brought one of my 80's to clear the place and tried again with success. Took the quest from him to escort and went cat thinking i could stealth and he would grab aggro being my tank. Not so much, nothing aggros him not even imps or dragons. I pulled the whole base and died. But when i came back he was still marching. I followed stealthed till he spawned 4 adds. I attempted to kite them but that just left my wandering into a pack of imps and my death again. I came back and he was still there. I pulled one add from a distance and killed it and they all despawned and he continued. Stealthed till the bridge to the mountain and he spawned 4 more adds. I got roflstomped twice and killed 2 dragons and in the middle of killing the last orc, he despawned and quest failed. Very frustrating quest. Going to level a bit or get help for it. Enemies shield bash to so casters beware.

Warning to geared 80 dpsers: it's quite easy to hit him for 40% of his health, meaning, you kill him before he turns friendly again.

Like the post above says, don't accidentally kill him. I did it, and it took 5 minutes before he respawned. If you're using an 80 (or above) to do this, just attack him two times at most, and then stop and try your shackles on him.

This DOES count towards Loremaster.

be careful, you can kill him.

Note: As of 4.0.1, he stops at the gate to Blackrock Mountain, waits 30 seconds, then teleports 30 meters inside and continues his walking.