'Game of Thrones' actress Emilia Clarke talks about that shocking death

— -- If you haven't seen last night's absolutely insane episode of "Game of Thrones," this is your cue to leave now. You have been warned.

Spoilers ahead!

In the penultimate episode of season 7, we said goodbye to priest Thoros of Myr and to one of Dany's dragons!

Daenerys Targaryen lost Viserion when the Night King threw a special ice spear into the beast, which caused it to crash and fall into an icy lake. Later in the episode, fans' biggest fears were realized as the Night King resurrected the dragon, which will now fight on his side.

"It's a heartbreak," Emilia Clarke, who plays Daenerys on the show, told Entertainment Weekly. "Not only losing it but having that being given to the other side ... My dragon could not have died for nothing, so this is now so important."

On the bright side, Jon Snow and the team he led north of the Wall found out last night that if you kill one of the White Walker leaders, his zombie followers collapse and die. Maybe it's the vampire rules, i.e., kill one who turned them and they all fall.

Clarke wasn't oblivious to the fact that the dragon that turned was named after her nasty brother Viserys, who was killed in the first season.

"Of course it's the rotten egg. Of course you'd turn," she joked.

EW also spoke to actor Paul Kaye about the death of his character, Thoros, after being attacked by a zombie bear. Kaye said, "Just staying alive for six seasons is an achievement in itself on this show."

"I like the fact I get [cremated] with my own booze as well. There's a message there somewhere," he added. "I used to like polar bears ... not anymore!"

"Game of Thrones" returns on Sunday for the season 7 finale on HBO.