Yolos VithNice... But turning into a dragon in-game just never appealed to me... A Dragon Form like the shout would be cool.
How about a series of Alteration spells that transform your avatar into the living embodiement of the ancient Nord gods. Fox, Wolf, Dragon, the like. Your avatar is surrounded by an aura of swirling blue flames, and their size is doubled. Includes fur patterns, ears, a tail, and four legs in the flames!
You should note that this thread was created for miscellaneous spells. If I wanted it to be Elder Scrolls (game or otherwise) related, then it would have been posted in the "Elder Scrolls General Discussion."