Thank you for your answer.
Ok. So the context in which I would like to use these words is quite special. In fact, I wanted to talk about animals that have been transformed into dragons (imaginary animal of higher rank) since they have succeed in some challenges, they have earned the right to become a more powerful living being.
But it's also good to know that it's grammaticaly correct to say "to be elevated to a higher rank" ! And in that case, could it be used for any context ? Or is it specifically used for a better job for instance, a better position in an organisation, or someone who's receiving a title (Lord for example) ?