This Weeks Bonus Event is the 
Dragonflight Dungeon Event. This Cache rewards players with a 402 or higher iLevel Item from the Vault of the Incarnates.
The Quest can be picked up in the center of Valdrakken, infront of the Auction House. It also appears whenever you enter a Mythic Dungeon for the first time this week. This Quest rewards a 
Cache of Vault Treasures, which contains any Item from the current Raid – Vault of the Incarnates. This Cache cannot include any Tier Sets, but Very Rare Items like the Whispering Incarnate Icon.
All week, open Group Finder (default hotkey: I) to queue for any Dragonflight dungeon on Normal or Heroic difficulty for a chance at extra loot.
Alternatively, create your own group of intrepid adventurers, travel to one of the Dragonflight dungeons, and set your difficulty to Mythic before entering.
Look for the following all week long:
The Bonus Events system consists of a rotating schedule of activities scheduled to run each week beginning on Tuesdays. Each Bonus Event grants a passive bonus to a particular game activity and offers a once-per-event quest with a special reward for accomplishing a related goal. The in-game calendar can serve as your one-stop reference for the event schedule. The Adventure Guide also offers a direct link to active Bonus Events, allowing you to easily accept any associated quests.
