Now Dunmer are clearly the experts of destruction magic and considering the Dunmer have always been associated with assassin lore (Morag Tong etc), does anyone else think it would be a good addition to introduce a branch of stealth destruction magic into future TES?

Something like a spell that causes "spontaneous human Combustion". A spell that needs sneak to get in close enough and is deadly from close range (like a dagger get massive bonuses) but doesn't cause the player to be detected. That or invisible fireballs.

We have illusion magic such as muffle and invisibilty that can also provide a means for an assassin to take the route of magic over agility based skills. Its just the killing that is missing.