Thread:Kingofevil9/@comment-5038193-20190913221130/@comment-33794256-20190921041744

His eyes will drain the positive emotion from anyone he uses them on. This means that he can LITERALLY sap happiness or joy from a person and make them feel sad and drained. Not only will this make them easy targets, but they'll also have the potential to attract Grimm to their location if any are around.

The downside is that if he uses them for too long, his eyes will begin to hurt immensly. It can also be disabled by gouging them out or blinding him with other means.