So not enough arcane to warrant Evermind, it's highly unlikely to be anything more than a dead card or a sideboard piece.
Dragon Wings was meant to be a 5C dragon piece, but most of the dragons already fly, and are high impact enough that flying doesn't change much.
Imperial Hellkite is just bad. In a deck designed to storm off and get a lot of dragons on the field, a dragon tutor on flipping over is too low impact to really make a decent play, especially at 8 mana.