HOW TO START HEROIC ADVENTURES IN DESTINY 2: CURSE OF OSIRIS
Just as in the base game, Destiny 2: Curse of Osiris features a type of patrol activity called Adventures. These missions are fairly short, on a smaller scale than main campaign missions, but help to expand Curse of Osiris’ lore. Providing an extra challenge, players are able to take on Heroic Adventures, a version that ups the difficulty level and rewards with loot essential to complete other Curse of Osiris activities.
In order to trigger Heroic Adventures, you’ll first need to complete all the story missions in Curse of Osiris, then visit Brother Vance in the Lighthouse, who will then task you with beating three Adventures. Upon completing these, return to Brother Vance to activate the Heroic version of these Adventures.
Note that you’ll only be able to undertake one Heroic Adventure per day. They’re also extremely tough, especially when playing on solo since they feature the Prism modifier which cycles through the elemental damage buffs every 30 seconds. Heroic Adventures are necessary to complete Lost Prophecies, though, so they are certainly worth completing.
That’s all you need to know to start Heroic Adventures in Destiny 2 Curse of Osiris. For more useful information and guides on the game, check out Twinfinite’s wiki page.