And It's awesome! It gives a whole new look on King Sombra, way better then what the original Hasbro depicted him.The comic gives the reader an insight into one of the enigmatic villains ever introduced into the MLP Universe. Now, I will not spoil anyone else except for the race Sombra is.

It seems he is an Umbrum a race of Shadow Ponies that are the natural at the arts of Dark and Shadow magic.