Unicorns

Unicorn ponies are a type of pony living in equestria, characterised by their horns and magic.

Physical traits
As the name suggests all unicorns have a long horn protruding from their forehead, which glows when any of their powers are used. Physically they are not as strong as earth ponies, and are normally a little smaller. Neither do they possess the agility of the pegasus ponies. They should not be underestimated though, their horn is strong and sharp enough to have mundane uses and Twilight Sparkle in particular has shown that a smart approach can overcome any physical limitations.

Magical traits
More than any other type of Pony, unicorns are defined by their magic powers. Their most basic is Telekinesis, the control of objects with nothing but the mind. Every mature unicorn has been shown to possess this, with fine control and maximum weight depending on skill and individual talent. Skilled unicorns are also capable of controlling multiple objects at the same time. Very large amounts of weight are shown to require significant effort and perhaps some transfer of the weight onto the Pony in question, notably Twilight’s levitation of the Ursa Minor in Boast Busters.

Apart from this basic talent all unicorn ponies are capable of learning other magical abilities, which are normally based around their cutie marks. Rarity for instance has the Ability To Detect Gemstones across a small area, and also has shown the ability to create Light Displays and complex Illusions. Twilight has stated to have 25 different things she can do with her magic as of Boast Busters, and has since shown the ability to learn Rarity’s gemstone ability. Her most distinctive unique ability is Teleportation, ‘winking out’ in one place and appearing in another. This always leaves her briefly disorientated afterwards and once left Spike slightly singed when she teleported him with her, possibly due to inexperience.

Trixie also displayed several unusual, rather flashy magical abilities. She showed the ability to Take Control of a Rainbow and give it physical force, using it to create a whirlwind. She also could Create Stormclouds and Produce Lightning from them. There are likely many other abilities we have not been shown yet.

Place in Pony Society
All the unicorn we have met so far have been quite educated and given the impression of refinement, whether this is a general trait of all unicorn is uncertain. Due to their telekinesis they are the only ponies easily capable of fine work, it is likely that most dressmakers and other craftsponies are unicorn.