Dynasty Horse

Appearance
Dynasty horses are only mentioned in Fiery Fiona, but are described as being a brilliant shade of glowing green.

Magical Gift
Dynasty horses are apparently able to glow in the dark, and are luminescent.

Notable Horses
Although no Dynasty Horses are ever named specifically in the card series or book series, there is only horse that fits this description. This horse is Ming.

It is possible, due to his appearance and apparent glow that Ming may be a Dynasty Horse.