Xayah & Rakan

Two brand new champs coming to League of Legends in the 7.8 patch are a support and ADC duo which can played which can be played separately but gain bonuses when played together
Link to the reveal

Xayah "The Rebel" Abilities

Xayah's Passive:

 Xayah's :Q
 Xayah's :W

Xayah'S ; E

 Xayah's : Ult

 Xayah and Rakan's joint passive