Spoilers for Legion follow. Tonight's Legion episode answered a number of running questions about the mysterious "Devil with Yellow Eyes" and its true connection to David Haller. We now know that this character is actually the Shadow King, a long-standing X-Men villain whose rivalry with Charles Xavier dates back decades. And though Xavier wasn't specifically referenced by name in this episode, it seems that rivalry has translated over into the show. For those not familiar with the Xavier/Shadow King dynamic in the comics, we figured now would be the perfect time to break down their shared history and how Legion's handling of the Shadow King compares to the source material. Continue reading…