Jason: Murder is punished, and you'll be destroyed by the avenging phantoms of you children. (224)
If Medea were like most Greek tragedies, Jason would be right about this. However, Medea, gets off scot free. Nobody takes out any revenge on her and, though she shows some regret about murdering her children earlier in the play, she doesn't seem all that bummed out as flies away on her dragon chariot.