Hello there!
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.
Skins:
Karma 260 RP
Officer Caitlyn 487 RP
Wicked Lulu 487 RP
Champions:
Quinn 487 RP
Xin Zhao 292 RP
Renekton 440 RP