New champion and skin sale started today 10.03 and it will last till this Friday 13.03. In the period you can get your Catlyn, Lulu and Karma a brand new skin.
Also you will be able to enlarge your list of champions by adding Xin Zhao, Renekton and Quinn.
Quinn 487 RP
Xin Zhao 292 RP
Renekton 440 RP