https://www.gamespot.com/articles/destiny-2-weekly-reset-festival-of-the-lost-detail/1100-6462388/

Ahead of its launch on October 16, Bungie has provided details on what to expect from Destiny 2's first-ever Festival of the Lost event. In addition to the rewards and masks you can get, the company revealed that Powerful gear will be up for grabs as part of a murder mystery involving Master Ives. Daily bounties will offer Fragmented Souls, which can be cashed in for masks and a new auto rifle, while there will also be a brand-new activity called the Haunted Forest. You'll face increasingly difficult enemies in what sounds like a Horde-style mode with a 15-minute time limit. Additionally, if you're at the level cap, you'll get a bonus Bright Engram (with new items inside) each time you fill the XP bar, and new cosmetics will be for sale at Eververse.