I'm writing a historical fiction novel, and there's going to be many scenes where people will have to address the Emperor. When the Emperor gives a command, the sentence I'm using right now in reply is: "As your imperial majesty desires." Now, I just made this up, but is this grammatically correct, and are there better alternatives? P.S. I've been reading Conn Iggulden's Conqueror series lately, and I've noticed that Iggulden uses the sentence "Your will, my lord" very often. Is this a popular sentence, or is it something Iggulden made up? Thanks!