Plot-
The main character is paricipant in one of the crusade war's on the crusader's side. He is following all the way to Jerusalem and by the way helping his side by magic. He makes the arrow's and sword's sharper and throwing shield's around important people in their midst.
Along the way he feels guilty that he is helping the Crusader's although if they knew his secret they would kill him.
How the main character is going to cooperate with other wizard's? Including his allies and his enemies. Will the guilt feeling's make him quit the war or will he finish what he started?
Character's- There are have to be other wizard's character's.
Ship's- I don't care. Hmmm but it sure will be more interisting if the main character fall in love with Arabian witch.

Hmmm that's it. Very challenging challenge I feel.
Tell me if I forgot to tell something important.