μυθωδῶς
From LSJ
οὗτος ὁ υἱός μου νεκρὸς ἦν καὶ ἀνέζησεν, ἦν ἀπολωλὼς καὶ εὑρέθη → This son of mine was dead and has come back to life. He was lost and he's been found.
Russian (Dvoretsky)
μῡθωδῶς: мифически, на мифический лад (τοὺς παλαιοὺς ὀνομάζειν Diod.).