Anarak Daduski

Anarak is a ruthless and straightforward man who has the unique ability to control radiation and anything radioactive he grew up in the water nation but was cast out due to him using his radiation bending to kill the family of his bully. (This takes place 7 years after the events of the legend of korra, and due to the harmonic Convergence that brought back the airbenders it also gave other people from all the tribes Completely new bending abilities that has never been seen before one of these many random people is Anarak).