New Champion (Shaman troll trundle betrayal!?)

Im a new player coming to league and with the diversity of champions i've notice one key champion style that seems to be lacking, there isn't a shaman style champion of any kind. I got thinking about this because i mainly play trundle and him being king of the trolls and trolls generally being associated with shaman type magic i would have expected riot to add in a new champ with lore pertaining to trundle. There is so much room to play with this idea the shaman could have been part of trundles inner circle and in the struggle to protect his band of trolls the shaman pledged his allegiance to him however his intent was very different he joined for a chance to usurp trundles throne and claim the title of troll king for himself and to shape the trolls into his ideal race and in order to do so he must win the league tournament. Another thought it mentions the ice witch who gave trundle his club of never melting ice perhaps this shaman is in coalition with the witch to stop trundle from continuing his conquest because he has grown to strong and the dark magic that once almost defeated trundle was not actually lifted it had remnants that the shaman intends to reawaken and harness to defeat trundle. RIOT PLEASE GIVE US A SHAMAN