Exploring a different take on the Sword in the Stone.
Even using Excalibur, Merlin's mentor Gaius couldn't defeat the last of the dragons. Gaius had to sacrifice Excalibur to petrify the the great beast. It is said that who ever can draw the sword from the stone dragon will be king. While the legendary sword may be freed, and the king of prophesy shall rise; so too will the stone dragon to seek her revenge on Gaius’ legacy.