New champion and skin sale started today 13.03 and it will last till Monday 16.03. In this period you can get your Pantheon, Darius and Ahri a brand new skin.
Also you will be able to enlarge your list of champions by adding Fiora, Lee Sin and Heimerdinger.
Midnight Ahri 375 RP
Heimerdinger 395 RP
Fiora 487 RP
Lee Sin 440 RP