You spent years getting your ass handed to you in his trials. Not by him, but by every guardian out there who also happened to be better at shooting you in the face than you were at shooting them. It happens. Osiris is the star of Destiny 2‘s first expansion, which takes place in and around the Infinite Forest on Mercury. The Vex is up to something and you, perhaps with the help of Osiris himself, will take it upon you to wreck some havoc to ensure that whatever they are planning doesn’t come into fruition.
The expansion is out December 5 and comes with a campaign, a new social space, strikes, gear and … not a new raid. At least not yet. Also, Osiris is a Warlock which automatically makes him the best.