House of the Dragon season three diverges from Fire & Blood across multiple arcs

House of the Dragon's third-season finale rewrites the Battle of Tumbleton — Forbes calls it "a total inversion" of George R.R. Martin's Fire & Blood. Beyond Tumbleton, Esquire reports reworked arcs for Rhaena and Nettles, and IGN notes Ulf the White's book betrayal plays out differently. Show creator Ryan Condal kept Gwayne Hightower alive past his book death, leaving a Hightower for season four.