Not only that it also allows the user to use dark snake like projections as seen in Sumire Kakei.
Just like the sharingan, the true source of power for this technique is negative emotions hidden in the user. If the carrier looses these emotions, then the contract gets destroyed.
In episode 15 of Boruto, Nue triggered Boruto’s Jougan. Even though Boruto beat Nue, it was just for the time being, which means we are going to see more of the Nue in the coming episodes.
Also, we did notice something much more important, the fact that Boruto’s Jougan activated whenever the Nue was around.
What does this mean? It means that the Nue is connected to Jougan and we will be seeing more of it in the upcoming episodes.