Fuck. I need to write this fast before I forget but please tell me what you think.
I just watched a video of a httyd dragon killer au where hiccup chose to kill Toothless and bring his head to the village, my brain being as it is immediately thought of a scenario where the events at the beginning of the story was the same (dying, waking up as a dragon, training etc, maybe not yet mastering his plasma beam) but instead of the Dragon riders discovering dragons edge, it's the dragon Hunters of Berk, or Drago (Hiccup joins him after eliminating every dragon near Berk with the queen being the only possible exception) with Hiccup in tow.
Of course Cinder would be shocked to his core, but being mostly dragon in mind, he wouldn't hesitate to kill, especially since those he recognizes as the saviors of dragons are now the ones killing them. He would encounter Hiccup, who would immediately recognize Cinderwing as a Night Fury (as well as a possible Titanwing) and set his goal to hunt the orange striped dragon. And of course, Cinderwing being who he is would end up with Hiccup pinned to the ground under his claws, with the opportunity to use his a particularly unstable plasma beam (due to incomplete mastery) or just straight up snap his neck, but ends up leaving Hiccup alive due to his human side of his mind and memories of the dragon riders.
After fleeing the edge he would continue training, setting a goal to find Valka and/or the Defenders of the wing out of necessity. I feel like Oswald would be the same as he was, so Heather and Dagur would be the same, Heather probably being a bit more cold but still ends up finding a love for dragons and still having saved Windshear. (Which would honestly make this story a prime target for Cinderwing x Windshear or maybe even the Light Fury)
Please tell me what you think of this idea, because I may actually end up writing it one day (maybe even set up a template for the story sooner rather than later if you like the concept enough)
Toothless would be dead, obviously