The promotional skins are on there way out. Fortunately, Riot made a quick and easy way for players to get all of them at once without fulfilling the old requirements.
https://support.riotgames.com/hc/en-us/articles/360001531228
The offer expires on August the 1st so spread the news before it ends.
https://support.riotgames.com/hc/en-us/articles/360001531228
The offer expires on August the 1st so spread the news before it ends.