I know I need burning crusade, and wotlk to make one, and I also need I think it's a lvl 55 or 58 character. Once I've met the requirements, and I decide to make a death knight, will my lvl 55 or above character change it's class to a death knight, dropping it's original class, or can I make another character of any race in the same realm and start as a death knight so long as a lvl 55 character or above is in that realm? How does that work, thanks.