Swain has Vastayan Blood in him according to Rakan.

At 3:03 Rakan tells Swain how he was gifted Vastayan blood, yet chose to be blind (to the wonder and beauty of Magic I'd assume). Now this is a rather interesting turn of events, considering how many lines Xayah has against Noxus, and Swain has the very same magic as them.

My own theory is Beatrice herself is Vastayan in nature, of a more...forbidden nature. As varying natures exist within the Vastayan, I believe Beatrice was a more malicious entity within the Vastayan Culture, one that was greedy and power-hungry. Banished by the other Vastayan's for her intentions, Beatrice comes along a young boy in Noxian lands. The boy is brilliant, but weak. She offers the boy power, in exchange for revenge.

The Boy named Swain, accepts, and becomes a prodigy over night in magic. His tactical prowess becomes the base line in which his magical ability flourishes. He enlists in the Military, and becomes an excellent Soldier, due to Beatrice's help. Despite being frailer, Beatrice helps Swain battle after battle, even numbing pain for a broken leg.

His Prowess in battle earns him more and more reputation, as he drives through the ranks. Eventually he reaches the spot where he is now, influential over the Seat of Power, and soon leads Noxus to war with Ionia.

What ya'll think?