Daedric Prince of Ass-Spanking, Spanking of the ass, and Physical Contact made between the palm of the hand and the gluteus maximus...
Just kidding...
I'd actually be the Daedric Prince of Hypothesis, Theory and Question. But I would mindfluff mortals into believing stupid theories just to titty around. Only I the Daedric Prince of Hypothesis, Theory, and Question, would know the answer to the question of how many licks it takes to get to the center of a tootsie pop. Also, my name would be Ty'eeshk (Pronounced Tie-Eeshk) because that just sounds badass. And my plane in Oblivion would be The Colossal Anus....just kidding again... it would be named Decomposition, and the rocky land you stand on in that realm would continuously decompose right before your eyes and reassemble, then decompose again like an infinite cycle. I would fill that place with flesh atronachs, Daedroths, dark seducers (for teh buttsecks), Storm Atronachs, and Dremoras.
And I have no clue what my artifact would be. I might not just have one.