Unfriend

(Technomancy) You curse a creature you can see in range with a repelling magical essence. The target must succeed on a Charisma saving throw or be unable to charm other creatures for the duration. If a creature fails this save and already has someone currently under the charmed effect, the creature under the charmed condition can immediately repeat the saving throw it failed to resist the charm, with advantage. On a successful save, the charm is lifted.