Euron Greyjoy's fleet killed Rhaegal using a Scorpion in Game of Thrones, while Daenerys and Drogon destroyed the ones mounted on the ramparts of the Red Keep in the Battle of King's Landing.

After all the hype surrounding Game of Thrones' "Battle of Winterfell ... "The Last of the Starks" ended with Euron Greyjoy using a scorpion to take out one of Daenerys Targaryon's dragons ...