Matt Smith as Daemon Targaryen in "House of the Dragon" season two.HBOThe "House of the Dragon" season two finale briefly introduces a mysterious new character.Brynden Rivers, also known as Lord Bloodraven, appears to Daemon Targaryen (Matt Smith).Here's why he's important to the "Game of Thrones" franchise.Warning: Major spoilers ahead for "House of the Dragon" season two, episode eight.After spending most of "House of the Dragon" season two dealing with incestual hallucinations and prophetic visions, Daemon Targaryen (Matt Smith) has one last dream in the final episode.