Crystal Pony

Crystal Ponies are a tribe of known to inhabit the Crystal Empire.

Biology
Crystal Ponies are similar in build to members of other Pony tribes, but are visually distinctive with gleaming coats, manes, and tails. Normally, their coats appear to have patches of slightly varying color, with their eyes similarly appearing different from those of other ponies and creatures. The majority of Crystal Ponies resemble, but royal guards have also been seen. Even rarer are instances of Crystal s, though these include the empire's former ruler Princess Amore.

Powers
Crystal Ponies are imbued with the magic of light and love, with they can channel into the Crystal Heart to spread its influence across Equestria. They are apparently unable to use this magic individually or in their own defense without the heart, given King Sombra's success in subjugating the Empire on more than one occasion.