The blue or purple thunderdrum ;D and it could be like the eagle and parakeet, or like the geenie and the atlantis, or the air and the seabreeze : same-ish dragons but with alternating colors.
I myself would squee like a maniac at a Toothless-ish dragon! It would definitely be a magic dragon. Smaug, as described above, is sooooo awesome with all its gems and stuff... Whoooo! Would be a badass-looking dragon.