"Gave 'em herpies, I did. Not like that, though."
The bad reputation of the Evil Eye proceeds all Witches for good reason. It is a terrible curse that can cause any number of awful diseases or maladies. After making eye contract with their victim, the Witch's eyes sink into dark vortices of malicious, roiling blood. They return to normal a moment later, leaving the target to wonder if they were merely seeing things as a cough heralds their oncoming illness.
Spend an Action, make eye contact with a target within 20 feet, Exert your Mind, and roll Charisma + Occult against the target's Wits + Medicine. If you succeed, the target is successfully infected with any mundane, curable disease. Their symptoms manifest immediately.