Emissaries, or paragon reputations, provide additional rewards and a reputation boost for a faction. Players will have three emissary slots and each emissary quest will last for 3 days. Players will need to complete four world quests that correspond to the emissary (3 for Tortollan Seekers or Kirin Tor) to complete the emissary and be able to turn it in to the faction's Quartermaster, labeled as an Emissary. One new emissary quest will be available every day.
Here you can buy Emissary chests boost for EU or US Servers.
You'll get guide for Emissary chests boost
• Gold
• Emissary Chest
• Azerite Power
• Some other stuff