Season of the Lost

 is the fifteenth season of Destiny 2 and the final seasonal content of Beyond Light, released on August 24th, 2021 and concluded on February 21, 2022. It is longer than Season of Arrivals at 6 months, therefore making it the longest concurrent season of Destiny. During the season, Guardians must rescue the lost Techeuns from the Ascendant realm as Queen Mara Sov prepares to exorcise a captive Savathûn of her Worm, all while fending of the forces of Xivu Arath.

Description
The Return "Mara Sov, Queen of the Awoken. It would be an understatement to say that much has transpired in her absence. Her brother, last seen lying in rest, walks among the Guardians wearing a new name; Xivu Arath’s forces rally in the shadow of the Black Fleet; and Savathûn has been revealed at the heart of the Endless Night. And so, it is now, under the light of a long-awaited sun, that Mara Sov returns to her Dreaming City and seeks an audience with the Witch Queen."

Savathûn, the Witch Queen "Sister to Xivu Arath and Oryx, this family of gods have challenged humanity for centuries. It was Savathûn who defied the Black Fleet, even as it drove a wedge between her and her sister. Although her motive remains obscured, Savathûn’s involvement with the Endless Night demands answers."

Seasonal Roadmap



 * August - September:
 * Season of the Lost Begins: Cross Play Live, Astral Alignment and Shattered Realm, Legendary Weapon Quests, Exotic Quest, Revamped Trials of Osiris Begins
 * October - November:
 * Festival of the Lost Event: Masks, Candy, & Haunted Sectors Activity
 * Season of the Lost Updates: Grandmaster Nightfalls, Astral Alignment and Shattered Realm Difficulty Options
 * December - February:
 * Bungie 30th Anniversary Event: New Dungeon, Gjallarhorn Exotic Quest, New 6-Player Offensive, Iconic Weapons from Bungie's Past, And Much More
 * Seasonal Events: Moments of Triumph, The Dawning

New Story Mission

 * Cocoon
 * Exorcism

Shattered Realm

 * Shattered Realm: Debris of Dreams
 * Shattered Realm: Forest of Echoes
 * Shattered Realm: Ruins of Wrath

New Six-player Activity: Offensive

 * Offensive: Astral Alignment