House of the Dragon Showrunner Explains Major Book Change in Season Three Finale

The episode reveals where the coin has landed for Rhaenyra Targaryen, with results that are decidedly mixed depending on one's viewpoint. This story contains major spoilers from the season three finale. Whenever a Targaryen is born, the gods flip a coin, and the world waits to see if the child will achieve greatness or succumb to madness.

As of the finale, the results are in for Rhaenyra — and they are decidedly mixed, pending one's viewpoint. Condal also promises 'a very worthy final season' after that season three ending.