hello! this is random but a post about convex in demise s6 popped up in my feed and it intrigued me. i never watched s6 and im curious to know, what's the sort of "plot" for demise? all i know is that demise was thought of by grian, but you mentioned xisuma coding it and the convex having something to do with it? is that just headcanon or based on something canon? either way, i'm intrigued!
So, in canon, Demise in season 6 was a game invented by Grian where whoever lasted the longest without dying won, but when you died, you got to sabotage and murder other players (but only through traps, not direct PvP)
For Cub’s canon, he took the guise of the superhero ‘Mr Invincible’ and performed death-defying stunts until he was killed. Upon dying, his demise skin was very, VERY vexy — with bluish skin, glowing eyes and a vex smile. It’s the same skin he said he used when pranking as The Jingler, an alias he made for himself, pranking the whole server (including his own stuff) completely anonymously (and only revealed it was him early Season 8).
I don't think Scar had any particular Demise lore (he was ill for a lot of it, or working on other projects).
I feel like Ren would've had some kind of complicated lore involving demise, but I haven't watched his perspective to see, it's only from general Ren experience and how he acts in other people's videos.
The thought of Xisuma coding it and ConVex involvement is purely headcanon. I imagine it being less of X having to do with the creation and running of Demise (Grian's a watcher, he's got the magical ability to do that by himself), but the Vex and/or Watchers stop him being aware of any of the possession/dangers/unusual activity of other players during it. He was the 3rd hermit out of Demise, so clearly they got rid of him quickly.
My headcanon of ConVex involvement in demise is that Cub was possessed throughout death by the Vex. As in, for the entire time after he died, the Vex were controlling his actions. (and according to the oneshot I wrote, he was conscious and unable to do anything the whole time, and the ensuing trauma is the reason why Cub and Scar stopped with the Vex stuff after Season 6, and why Cub changed his skin in Season 8)