What caused Sombra to become one of the most feared ponies in Equestria's history?

Tirek's mad quest for power starts here!

The Sirens from Rainbow Rocks Equestria origin revealed!

The untold story of what Nightmare Moon did during her time on the moon!

The ponies visit the imprisoned Chrysalis... what secret is she hiding?

Friendship is Magic explores the secret origins of Equestria's greatest villains: Sombra, Tirek, Sirens, Nightmare Moon, and Queen Chrysalis!