https://www.gameinformer.com/2018/0...who-helped-kill-cayde-6-in-destiny-2-forsaken
At the start of Destiny 2: Forsaken's campaign, Uldren Sov, the Prince of the Reef, shoots Cayde-6 dead. This sets him up as the main antagonist you'll be taking revenge against in Forsaken, but Cayde doesn't die by his hand alone; to pull off the feat, he has help from the Barons, a group of powerful Scorn enemies. Hunting down the Barons comprises a large part of your journey the initial campaign, and each has their own story, traits, and boss encounter, making them some of Destiny 2's most interesting foes yet.
Bungie was able to give us in-depth, official info on who each of these Barons are, including their history, stats, and brief snippets of insight from Cayde himself, learned from when he had to put the Barons in their place the first time around.