Here are all the new dragonriders in 'House of the Dragon,' including the girl who claimed Sheepstealer

Warning: Spoilers ahead for the “House of the Dragon” season three premiere.

As its title suggests, “House of the Dragon” focuses largely on the fabled dragonlords of Westeros.

The HBO series is based on George R.

Martin’s fictional history book “Fire & Blood.” It tells the story of the Targaryen civil war, known as the Dance of the Dragons, which fractured the family and decimated the dragon population.

Flash forward about 170 years, when “Game of Thrones” begins: there are very few Targaryens left alive, and the dragons have already been extinct for generations. (That is, until Daenerys steps into that funeral pyre.) Legend has it that only members of House Targaryen, directly descended from the Blood of Old Valyria, are able to communicate and bond with dragons.

In Martin’s books, the ancient Valyrians believed they were literally related to dragons — and many Targaryens who ruled Westeros believed themselves to be closer to gods than men.

However, in “House of the Dragon” season two, we see that merely a drop of Valyrian blood can do the trick.

Bastards known as “dragonseeds” are able to claim dragons just as well as the incestuous royal family.

Three low-born men join the ranks of dragonriders in “House of the Dragon” season two.

In the season three premiere, yet another character makes history by claiming a wild dragon, something previously thought to be impossible — or at least exceedingly dangerous.

Here are all the new dragonriders that appear in “House of the Dragon” seasons two and three.

Eammon Jacobs contributed to a previous version of this story.