In the seventh season, Cersei Lannister commissions Qyburn, her new Hand of the Queen, to construct a weapon powerful enough to battle Daenerys Targaryen's dragons. He then creates a series of long-range artillery weapons each similar to a ballista or an industrial-sized crossbow. Dubbed as scorpions, these bows shoot a bolt fast enough to pierce the skull of a dragon — or so Cersei thinks.
During the Battle of the Goldroad, Bronn fires a scorpion at Drogon while Daenerys rides him to safety. The bolt hits the animal in his shoulder and fails to penetrate Drogon's scales. Seconds later, the beast blasts the scorpion with fire and crushes the remains with his tail. Clearly, this weapon is no match for Daenerys or the Night King both of whom have dragons on speed dial.