The Final Seal

This is the final step of the Zandalar Forever!

Prerequisites: (can check comments in each achievement for more info)

1. 
   
2. 3 zones questchains:
   
   • 
     
   • The Dark Heart of Nazmir
   • 
     
   • Secrets in the Sands
   • 
     
   • The Throne of Zuldazar
   • 
     
3. 
   
4. Short storyline of A Bargain of Blood
5. 
   

You need to complete Zandalar Forever! quest and it is gated behind ~300 main BfA horde storyline quests (more info in the achievements above)
Quest can be not visible on the map and you have to go and check it to the [npc=135890] near the Blood Gate
/way Zuldazar 60.0 22.4 King Rastakhan Zandalar Forever! questgiver

Here is the Zandalar Forever scenario demo video: https://www.youtube.com/watch?v=yIRWWa4wt1w

If you do not know what to do to start this and you have the other four (The Throne of Zuldazar, The Dark Heart of Nazmir, Secrets in the Sands and A Bargain of Blood), I am sure there is a quest waiting for you at in Zandalar at 60.0, 22.2. This one: Zandalar Forever!. Should also be visible as a giant yellow exclamation point on your map - yes, I also did not notice until I had asked in guild and embarrased myself :)

The ending cutscene made no sense. Sure, Rastakhan killed Zul, but what happened to Mythrax the Unraveler? He didn't just go ~poof~ just because Zul died. Wouldn't Mythrax just start rampaging? Bwonsamdi just sits there after Mythrax destroyed the Final Seal....and then everything is cleaned up afterwards and the city is working like normal? This is very unclear.