A Tahm Kench Theory,
I was looking through Tahm's list of champion taunt interactions when I stumbled upon something REALLY interesting. When taunting Gnar and Ekko both, he mentions time as a river, a river he can freely traverse and has control of. As Kench is, "The River King." So If Kench has control over all rivers, including this "Time River" that means that our favorite River Demon might be something we never expected. #He might just be a Time Traveler. ######Or time swimmer to be exact? Swimming from time to time, present to past to future. Making deals that end up with his victim miserable and full of despair. I wonder, has he offered someone a chance to fix something they've done in their past? Or to see their future?
When Taunting a Ally Gnar Kench will say, "Time is just a river, boy, let me take you back where you belong." So Kench can indeed swim back and forth in the river of time, offering bargains to those he meets on the way. The "Time River" is mentioned again in his quote for Ekko, "Time is but another river - and I care not what water I swim in." #Bruh, this fish is a freaking time traveler.
######Edit: Lets um not talk about the extra 'L' in "Traveller" below in the poll...