Mark of the Sentinax

How to get [item=147582]:

First, find the Sentinax, the big ship that stations itself in different places over the Broken Shore (meaning the island southeast of Dalaran, not the entire Broken Isles continent). You can see its current location by looking at your map while in Broken Shore. Carefully, go under the Sentinax. There may be packs of hostile mobs including elites, so watch where you're going. The normal mobs for that area will also be there, sometimes including powerful rares. When you are under the Sentinax you have the [spell=240640] buff.

The Sentinax also shoots a moving death ray over the ground. It's a small but lethal sickly green patch with green falling down into it. Watch for this and stay out of it -- it will kill you.

If you see portals under the Sentinax, kill the stuff coming out of them. Tagging rules are unusual in this area: opposite factions tag things, of course, but so do five of your own faction. You must be one of the first five to hit it in order to get credit. This may not apply to the biggest elites.

If you do not see portals, look around in the whole area under the Sentinax. Portals will be yellow dots on your minimap.

If you still do not see portals, you can wait until other players come along to summon them, or until the Sentinax spawns more, as it will eventually. Or, you can get Sentinax Beacons by killing the other mobs under the Sentinax. To use a beacon that you get this way, right click it and follow the green beam to where it eventually opens a portal. Hostile mobs will immediately start spawning from it.

Killing mobs that come out of portals can get you more powerful beacons. There are also different types of beacons that summon different types of mobs. For more about the different kinds of beacons and how to get them, see the Sentinax portion of the Comprehensive Broken Shore Guide.

For the purpose of this quest, just know that all mobs that come out of portals have a chance to drop Marks, and that harder mobs drop more Marks.

Portals only stay open for a few minutes unless they are extended or empowered with another Beacon. If you get a rare or epic Beacon, it'll summon more powerful mobs, so be careful.

There are places in the Broken Shore that can have portals unrelated to this event. If you're not getting any Marks from mobs out of a portal despite successfully tagging them, and the portal is lasting a lot longer than a few minutes, you may be at one such portal. Ignore that one and keep looking.

As a solo player I was a bit dismayed reading about this, however I was able to get it finished in about 30 minutes, here's how:

Use the premade group finder, the questing option. Look for "Sentinax" in the search bar, then find groups of just a few people - someone said this can't be completed in a raid so make sure it's a group of less than 5. At any rate, I just jumped into a group and went to the location and farmed the normal mobs with everyone else. Yes they do just drop 1-2 a piece, but when you kill a lot of them then it goes by pretty quickly. The only problem is if there are people of the opposite faction in the same area then the mobs will be tagged and it can get messy. Fast.

Best of luck, I managed it in about 30 minutes, hopefully your luck is similar.

Just completed this on all 11 of my alts. What a pain in the ass this was post-content, but I think I found the best way to do this as a solo player post-7.2.

If you plan on getting the class mount on several alts that you are doing at the same time, I'd definitely recommend the way I did it. Just as a bit of extra info, all my alts were in full Unsullied/880 gear with one 970 legendary.

First thing's first, do not simply go out and 'grind' the mobs under the Sentinax. I did this on my first alt and it took over 4 hours to get enough beacons to drop in order to complete the quest. That's a whole lot of time you're wasting if you're doing several alts. Instead what you should do is use your Nethershards you gathered from the previous quest and wait for the Nether Disruptor to be active. At the current rate it's usually active every 5-6 days. What you should do then is buy 5 Nether Portal Disruptor from the vendor at Domination Point. If you have a well geared alt with good burst damage you may only need 3, but 5 should generally be the max you will need.

You then need to go and use the item on the portals around the Broken Shore. This will spawn a Rare Elite which will drop a Greater Beacon if killed. Some of the rares are far easier than the others in terms of health and mechanics. The Overfiend is probably the most difficult as he spams a fear and has 60 Million health. If you get unlucky and come across a Rare that is giving you too much trouble, it's not an issue, just go find another portal and hope you get one of the easier Rares. You should still have plenty of Nethershards left to buy more items if you get unlucky.

Once you have killed 5 rares you should have 5 greater Beacons. You can then go and use these under the Sentinax to spawn enemies that will drop between 12-24 marks per Beacon. If you're not using a good burst AoE class, then the Warbeasts Beacon can be a bit of a challenge if you pull them all. So simply stand back and kill them 2-3 at a time.

But that's it. I found this method to be far the most effective assuming you're soloing and not in a group. Each alt took around 20-30 minutes to complete this quest.

Hope this helps \o/