Suggested by Eric Vaatu and Raava are both super powerful entities which have fought for many years. Their powers are matched only by their imagination as their stalemate lasted for hundreds of years. That being said, Vaatu seems to have the edge as Raava has to go and get help from the humans. You’d think that the light spirit would beat the dark one, but they tend to falter in these shows. It is with a heavy heart that I have to give a decisive edge to Vaatu on this one. Vaatu wins.