The 10 Best ‘Game of Thrones’ Fan Theories

4. Euron Greyjoy Will Be Able to Control a Dragon

The Greyjoy siblings’ uncle, Euron, has upended a whole lot of stuff in his relatively short stint on the show, but some fans think he may have more in store. At one point, the nefarious sea captain told Cersei that he had a present for her. Though it’s likely that Euron’s gift was taking Dorn out of the battle (at least for the time being), some fans think that he might have been referring to a legendary horn called Dragonbinder, which is in Euron’s possession in the books. If it doesn’t melt you from the indside out (long story), Dragonbinder can reportedly turn a dragon into the user’s pet. Some believe that Euron or Cersei will use Dragonbinder to successfully sway a dragon to their side. This is an admittedly slim possibility considering that Dragonbinder hasn’t yet been mentioned in the show.