Board Thread:General Discussion/@comment-29275465-20160826234143/@comment-1031724-20160920031823

Oh, Generic Doomsday Villain. That explains it.

Well, if I haven't said it already, he doesn't speak much, but it's described his heart is black as night, he enslaved an entire empire after presumably killing its princess, and it's shown in an alternate future that if he hadn't been stopped, he'd have brainwashed the crystal ponies to try to conquer the world, leading to the pony version of World War II in which Rainbow Dash gets her wing cut off, possibly by Sombra himself.

He's not the only one, there's also Queen Chrysalis and Lord Tirek, and it's not even limited to Friendship is Magic, in G1 there was the original Tirek who threatened to behead a baby dragon. Anyone who thinks MLP can't have dark villains, get with the times, not every generation of it is a prissy show (though I think the other two are).

In the comics he reformed, but he was considerably less evil there, where Chrysalis was more evil, killing a kitten and threatening to do the same to the CMC.