Here’s the story bits: Empress Caiatl, daughter of Calus and leader of the Cabal, seeks out Zavala for an alliance with the Vanguard. When Zavala refuses to kneel, threats are exchanged by both sides. Guardians must preemptively strike at her growing army while continuing to fend off the destabilizing influence of Xivu Arath.
Along with the gear, new and returning Strikes are available for you to test your mettle. You can also wield the Hammer of Proving against the Cabal, and fight for honor in the new seasonal Battlegrounds activity.
You’ll fight against Caiatl's chosen warriors in Battlegrounds, a new matchmade activity for three players. At the start of Season 13, The Devil's Lair and Fallen S.A.B.E.R. Strikes will return from Destiny at the beginning of the season, with the Proving Grounds strike unlocking later. In Proving Grounds, humanity's champions will go up against the Cabal's best to determine the Last City's fate.
Season of the Chosen runs through May 11. Read up on Seasonal Challenges before diving in.