They discover it by accident when, the next time Merlin calls for Kilgharrah, it is Arthur who walks into the clearing first.
Or: Due to his Pendragon blood, Arthur is compelled to obey Dragontongue. He and Merlin have some fun with this fact.
- Part 131 of Merlin Fic
Bookmarked by TirsovAmber
10 Aug 2020