Dragons are alive and running in House of the Dragon, not to mention that they are more numerous than when Daenerys Targaryen hatched his almost 200 years later. These creatures that spit fire are as varied as the human characters themselves, each with their own design, color, squeaky and even their own background. At least 17 dragons are still alive, but Who is the biggest dragon of House of the Dragon? How big is Hagar in House of the Dragon? At this time, Hagar is the largest dragon in House of the Dragon. Argon's conquest, and had become the greatest living dragon of his time. ** It is during episode 6 of House of the Dragon that we really have an idea of how big is Hagar. When Lana and Daemon travel together, Hagar seems to be twice the size of Carafes, who is still quite large. At the time of House of the Dragon, Hagar is also entering years, reaching almost 200 years, which is just when Balerion died. She was one of the three original dragons that joined the six of t...