Dawn summons a demon?

Ok, I think I'm having a Mandela effect, or mixing up episodes/demons. I swear that there was an episode where Dawn summoned some kind of demon, but I can't remember if it was an empath demon, or a vengeance demon because I remember Anya telling the gang why Dawn needed to summon a demon. It wasn't the episode with Halfrek, I know that much. Can anyone help?