Swain was the first champion to be announced and then reworked before he went live. As shown in his Champion Spotlight, Torment's damage over time was increased by the amount of damage taken in its duration.
According to Phreak, 斯维因的Nevermove ability was originally supposed to be called Nevermore and was called Nevermove as a pun. When the ability was implemented in the game the name was just never changed back.
The ending quote to Swain's background is based on Joseph Heller's novel Catch-22.
Based on the lore, Swain was unable to compete in the Ionia Versus Noxus Grudge Match due to recently becoming a member of the Noxian High Command, thus needing to take time away from the League to put all his affairs in order.
Swain is the second champion to feature a transformation ability, the others being Nidalee, Shyvana, Zyra and Elise.
The color of Swain's form in Ravenous Flock changes with different skins. Classic Swain is black, Northern Front Swain turns white, and Bilgewater Swain turns red, and Tyrant Swain is blue, with clothes and a staff. In addition, Beatrice's form is either a snowy owl or a parrot in Swain's respective skins.
Swain is the Grand General and leader of Noxus, one of Valoran's most powerful city-states.
Swain was a member of the Black Rose, a dark and mysterious group that controlled Noxus before the rise of the military government. They were thought to no longer exist. However, with the reemergence of their leader Leblanc, the Deceiver, the Black Rose are working towards getting the organization back into power.