Missing Bosses for The Originals WoW Anniversary Quest

Lord Kazzak missing may be due to phasing. Try the following:

• Speak to Zidormi to change the phase of the Blasted Lands
• Ensure all Legion class hall quests which take part in Blasted Lands are complete
• If you have started the questline to unlock Mag'har Orcs, finish it

The Dragons of Nightmare are four separate bosses around the world. They may not all be in the world at the same time.

• Lethon
• Taerar
• Ysondre
• Emeriss