Occasionally, members of House Targaryen will instead become dreamers, the sporadic recipients of prophetic visions called dragon dreams. Phia Saban as Helaena Targaryen in House of the Dragon season 3 episode 5. Henry Ashton (Daeron Targaryen) in A Knight of the Seven Kingdoms. The Dreamers spell doom for HelaenaDaeron's storyline in A Knight of the Seven Kingdoms indicates the validity of Targaryen dreamers' prophecies. As such, this recent emphasis on dragon dreams marks bad news for poor Heleana.