I would search for:
Free roleplay character development magic duel spellsystem
that would have been my wish. Indeed, in MD much of these have
come to realization, but not any spellsystem
( at least not upto mp4, wich i am now with my character ) .
So: if i would look for a game like MD, then add to the above keywords:
sophisticated fightingsystem creature pets.
regards, player of denotar