The Eudoriad
The oracle decreed disaster. Castor, King of Thebes, would be murdered by his own brother. As the first of seven sons, Castor had six murders to commit if he wished to cheat the fates.
Eudora, Castor's wife, ingeniously suggested he start a war with neighboring Sparta. "Make your brothers into Generals. The Spartans, far superior, will decimate them.”
Castor agreed, but arrogantly wishing to absolve his guilt, he told his venerable mother what was about to happen. He urged her to pray to the Gods for their deliverance into heaven.
Fate being involved, you can probably guess the cathartic outcome.