Daenerys Targaryen's three dragons — Drogon, Rhaegal, and Viserion — have always been an important part of Game of Thrones.
RIP Viserion.
But recently in Season 7, Dany's dragons have played especially significant roles during battles with the Lannisters and the White Walkers, respectively.
"We've modeled the dragon and then laser cut this full scale giant piece of polystyrene to create a section of the dragon's back that is living on the island at the frozen lake," visual effects producer Steve Kullback said.
Here's what it looked like when The Hound, Ser Jorah, Tormund, and Beric climbed atop Daenerys's dragon when she came to rescue them north of the Wall.