Quote Originally Posted by Dervy View Post
Well, it kind of fits in with the lore.

Hydealyn is no longer watching over us. Our powers have been revoked by Midgardsormr. But doing so, he realised that we were chosen by Hydealyn, not born or gifted with our powers of the Warrior of Light. Our Protector is now Midgardsormr. In a cut scene, the Dragon Minion is clearly is him, as he summons himself and speaks to us in the Rolling Stones. So he's now our protector, resurrected as a Dragon, can summon himself, move, talk, yet doesn't possess the ability to grow?


Look at the feet of both Dragons as well. Both red.
Furthermore, Midgardsormr did state that his minion form was temporary. It wouldn't be unreasonable, considering a dragon of his size, to grow into the size of the mount in such a short time.