The Gray Prince Edit
The Gray Prince is or was the Arena grand champion.(Depends If You Killed Him). He is actually pretty hard to kill. But if you want to kill him easily simply talk to him before you fight him to be grand champion. He will tell you of his past and how he wants to prove his nobility because of his mother, a maid and a lord,Lavidicus created him. If you do this quest you will find Lord Lavidicus in a fort called Crowhaven north of Anvil as The Gray Prince told you to go there. Lord Lavidicus is actually a vampire and and you must kill him or sneak past him and get his Journal. Bring it back to The Gray Prince and he'll teach you moves but hates himself and when you fight him he'll just stand there and let you kill him.