King Sombra

King Sombra is one of the main antagonists of the series and was the former ruler of the Crystal Empire.

Appearance
He has grey fur with black mane and tail with a Smokey like appearance.

He wears a red cape and some kind of crown on his head.

His Horn is red and eyes are green with a flash of purple.

Personality
Compared to other villains on the show, King Sombra's personality isn't too elaborated on. Instead, he is little more than a dark, looming menace for most of the episode.

He has very few speaking lines, some of then half-incoherent, and is a very mysterious character, whose backstory is limited to the fact that he enslaved the crystal ponies.

The source of his dark powers and his motivations remain an enigma.

However, he is shown to be extremely cruel, fierce, brutal, sadistic, heartless, destructive, merciless, and wicked, viewing crystal ponies as nothing more than his slaves, using fear on them and other characters, and licking his lips as the prospect of possibly killing Spike (although he may have primarily been after the Crystal Heart).

He is also shown to be tyrannical, manipulative, and power-hungry, as in the altered future he tried to take over the rest of Equestria once retaking the Crystal Empire, creating a dark future of war.

He is believed to be the most evil villain in the show. Sombra appears to be very satisfied, thoughtful, intelligent, appreciative, and perspicacious, as he seemingly thought ahead of his enemies and placed a curse upon the empire to disappear if he gets defeated, and he cleverly booby-trapped the way to the Crystal Heart.

He ended up outsmarting Twilight as she fell for every one of the traps, more than one of which would have defeated Twilight Sparkle if not for the presence of Spike.

Powers, Skills and Abilities
King Sombra appears in the show as a being of pure darkness.

Due to this, he appears to be virtually impossible to damage via targeted magic, easily dodging Shining Armor's magic beam.

However, he cannot penetrate some magical barriers, as he was unable to touch the Princess Cadance's field of love magic without getting harmed.

His dark form can spread to immense distances, to the point that he can surround the Crystal Empire all by himself.

He can also sink the ground and travel this way, leaving a trail of sharp crystals in his path.

Celestia states that she and Luna were the ones responsible for turning Sombra into shadow.

This may imply that he could be powerful enough to require the might of two alicorns to defeat him.

King Sombra's main power seems to be creating dark, jagged crystals.

Those can serve as sharp weapons or cages to imprison his enemies.

He can also engulf a unicorn horn in his darkness, covering it with crystal, which blocks off their magical abilities.

King Sombra's unicorn magic is unlike any other previously seen on the show.

It is inferred by Celestia to be dark magic, powered by hatred and fear.

The glow associated with it is a toxic purple bubbling.

Though it can be cast by others, Sombra seems to be the main practitioner of it.

It is affiliated with corruption, able to taint the Crystal Empire in a matter of minutes.

In addition to creating dark crystals, this magic can also be used to show one an illusion of one's greatest fear, or even counter teleportation magic.

He also seems to know some reality-warping spells.

The Crystal Empire's disappearance from space and time was due to a curse of his, and he also utilized hidden portals, animated doors, and even pocket dimensions as part of his defences for the Crystal Heart.

Weapons
His dark magic.

Family

 * Queen Chrysalis (Wife)
 * Hades Mercy (Son)

Voice Actor
Jim Miller.