The Curse mark that boruto has spreads along his body, the way we see it in chapter one, the way it looks on his arm is similair to the divine tree, feel free to look at it. That got me wondering what if the curse mark gives one the power of the divine tree? That would be absolutely insane, that would explain how Kawaki managed to destroy the village, because Naruto and Sasuke where probably older and more rusty, which gave Kawaki the upper hand, and then later on, Boruto's curse mark expands even further, making him a rival to Kawaki in strength and thet's how they fight. This is a speculation that came to mind, what do you guys think?