“House of the Dragon” were finally treated to the show’s opening credits sequence on Sunday night (the first episode did not have opening credits), though many were perhaps surprised to discover just how similar to the iconic “Thrones” credits this new sequence is.Indeed, the “House of the Dragon” opening credits use the theme song from the “Game of Thrones” credits (by composer Ramin Djawadi, who also scores the new show) instead of opting for a new theme, although it’s perfectly in keeping with the show’s vibe overall. While “House of the Dragon” focuses on new characters, the prequel is very much in the world of “Game of Thrones” and shares crucial DNA with the hit HBO series.Elastic, the design firm behind the iconic opening credits for “Thrones,” returned to create the credits sequence for “House of the Dragon” which makes great use of blood throughout.