Aaah, that actually sounds really awesome! That's my favorite way to take a character-- pick a canonpoint where the development's not shown, or where they don't develop when they could have, and see what directions or progress they can be shoved in through game CR. Though YEAH I could see horns!Joshua being a major bag of crazy to take on.

....I do not have enough :D-emotes. PM me an email address to send them to?