Proving Ground is a new Strike in Destiny 2, capping off the Battlegrounds activity that's been running throughout the Season of the Chosen. The Strike ends the story of the Vanguard's hostilities with Cabal Empress Caiatl while also providing Triumphs essential to the Chosen seal and title, and coming with its own Seasonal Challenge. There's a lot to do in the fast Strike, and it's easy to miss elements of it if you're running through as quickly as you can.

Here's a rundown of what you need to do in Proving Ground to unlock the Proving Ground Trifecta Seasonal Challenge and Eliminate Caiatl's Cabal Triumph.

Proving Ground Trifecta Seasonal Challenge

The Seasonal Challenge for the Proving Ground Strike is pretty simple to complete, although you'll need to do the Strike multiple times in order to knock it out. It contains three objectives: