This is another custom that uses a Masters of the Universe head atop a Mythic Legions body. After I had build my King Treadaway figure, I knew that I wanted a Prince to stand beside his kingly father. I had a MOTU Bow figure in my fodder box and his head looked perfect for a young prince to me! I named him Prince Eric, using the first name of the Horsemen whose likeness inspired the King figure.
This is a very easy kitbash figure - I can't even really call it a custom because it is so simple. The head comes from a Masters of the Universe Bow figure. This is the "classic" head from that set. Instead of dremeling the head to get it to fit on the Mythic Legions neck post (which is what I normally do with MOTU heads for my customs), this figured uses a custom cast neck from a customizer named BadVermin. That piece just plugged into the torso and it included a smaller "ball" connection at the top so that the MOTU head would pop right on without needing to be dremeled. This figure also uses a BadVermin back connector to attach the shield to the Prince's back. That piece plugs into the rectangular hole on the figure's back, allowing the shield to then peg in.
The body of Prince Eric is just a Knight Builder KIt body with a helmet and weapons from that set.