[This story contains MAJOR spoilers from the House of the Dragon season three finale.] “Do not trust the queen. Aegon has returned. His dragon lives. Your unborn child is a hostage, a prize by which she can hold power over her enemies. She will never release you.” These end up being among the final words Queen Helaena Targaryen ever hears. In the House of the Dragon season three finale, a newly ousted Mysaria (Sonoya Mizuno) issues her stark warning to the recently imprisoned Helaena (Phia Saban), who internalizes that information and weaponizes it: first, by way of speaking ugly truths about Rhaenyra (Emma D’Arcy) right to her face, and…