Apparently replaying Seek the Highb100d makes me somewhat more charitable towards my patron troll, because I made this:
It's mostly a recolor of a front-on pose of John's Heir outfit, though I also took Equius's glasses and horns from his sprite and resized them appropriately. The Void symbol is just something that I think looks appropriate and that I might have picked up from someone else's Void ideas. I couldn't decide what to recolor the shoes to so I just added 20 degrees of hue (like the whole thing is if you compare it to John's outfit's colors, give or take some 'this looks better' adjustments) and darkened them some, then noticed how close they were to Nepeta's blood color and went straight to that because d'aww. The wings are a horse-fly's, and the veiny stuff on them are just what was from the reference picture I used to make their lineart.