Creature of the Rainbow Mantle

The Creature of the Rainbow Mantle (or Creature of the Rainbow Coat) is a creature who lives on Graynor.

True Form
He is a white horse with a long rainbow-colored mane and tail. He has baby blue eyes. He has brown hooves, with yellow feathers above them.

Disguise
When he is disguised, he appears as a horse with a light brown coat, and a dark brown mane and tail.

Season 5
While Tecna, Musa, and Stella searched for the creature, his tracks were seen leading to a bush from which it came out of. When the Trix arrived and attacked the three, they ended up knocking him over a cliff. As he was about to fall Bloom, Flora, and Aisha arrived just in time to save him and as he observed them he deemed them worthy and revealed himself. He then used his powers to cure the Winx and created a bright light that drove the Trix away, he then followed the Winx back to the Ancestral Spirit of Nature.

Magical Abilities
He has the power to keep wild magic and fairy magic in balance. He can undo spells and recover a person's stamina. The Creature's magic is the color of the rainbow, very bright and sparkly.

Shown with the Trix, the Creature can create luminosity so intense that it can blind someone.

Trivia

 * Along with Peg, they are the only horses that appear in the series.