The newest champion in League of Legends is Nami, the Tidecaller. A support champion and a water based champion with powers that allow her to command the tides and channel the energy of the ocean itself.
Surging Tides(Passive): Increases the movement speed for all allied champions affected by Nami's ability.
Aqua Prison: A big water bubble is sent to that air then dropped on a targeted location, dealing magic damage and displacing the targets in its radius.
Ebb and Flow: A pretty cool attack that can work both ways. Nami sends out a stream of water that can bounce from champion to champion and deals magic damage to anyone in its path. Alternatively, Ebb and Flow can be targeted at allies and it will heal them as it goes from champion to champion.
Tidecaller’s Blessing: Nami buffs an allied champion, adding extra magic damage but slows down their attacks.
Tidal Wave: Nami summons a massive Tidal Wave with an extremely long range. The wave deals magic damage and slows down any champion in its path. Similarly to an actual wave, the closer you are to its initial start, the less you will be effected. The further you are, the larger the impact which in turn slows you down for a longer duration. Tidal Wave has a pretty significant range and duration.

Don't forget to check out our previous League of Legends articles and our breakdown of Zed, The Master of Shadows.