Daemon Targaryen's Connection To The Three-Eyed Raven Sets Up A Huge Game Of Thrones Mystery That The Winds Of Winter Could Solve
Daemon Targaryen's Valyrian steel sword, Dark Sister, is a key part of his character, but its whereabouts are unknown in Game of Thrones' timeline.
https://screenrant.com/house-of-the-dragon-game-of-thrones-daemon-three-eyed-raven-dark-sister/