In addition to a few bug fixes, the original artworks for Teemo and Fizz are back to the store for free (for those who won 3 copies of each of them)!
Image Credits: Riot Games
Cards Realm
The skins are a part of a bundle that includes 3 copies of each champion, which costs 300 ingame coins. However, if you already own these copies, it will "cost" 0 coins!
Image Credits: Riot Games
Cards Realm
The skins were changed after the latest set, when Fizz and Teemo received new artworks.