What caused Sombra to become one of the most feared ponies in Equestria’s history?
One Amazon reviewer says:
“This comic shows what King Sombra’s life was like before he went down his dark path. In it, it shows his childhood and how hard it was for him. It also shows us how he fell in love with a Crystal Pony named Radiant Hope. Sombra becomes corrupted by the dark forces known as the Umbrum, a race of shadow ponies who seek to take over the Crystal Empire, and Sombra is their creation. This story shows Sombra as a tragic villain corrupted by evil forces.”