For those that are interested in the content of the event, there are some missions that you will need to finish to claim your rewards. You will be tasked to play the game, win some match, Kill barons and many more to get the “Rift-to-Rift” rewards.
This event page “Rift-to-Rift” can be accessed in the main lobby below your profile picture, the events tabs will be available after clicking the button. There is going to be Champion Selection Chest, Random Skin Chest, Random Champion Chest, and many more rewards in the event. You might also get the K/DA skins depending on your luck, since the highest skins tier is Epic.
So what are you waiting for? Play it now and get your free skins! This event is available in December 2020