Major plot details for the "House of the Dragon" Season 3 finale ahead. "House of the Dragon" Season 3 was a wildly messy experiment. It felt like it dragged and rushed at the same time, and many of its deviations from its source material were so bad you understand why George R. R. Martin disavowed the adaptation of his book "Fire & Blood." Indeed, even if the Season 3 finale left a lot to be desired, it still delivered some truly stunning moments of dragon combat, among other things. This plot point may have been invented for "House of the Dragon," yet it comes with huge repercussions for other projects based in Westeros, including the previously-announced Aegon the Conqueror movie.