Dragon's blood echoes

King Saliyn seals the ancient dragon, running dragon-blood experiments. Teen subject Kael breaks free, joining officer Ian, brother Sorren, and assassin Layla in rebellion. Across four nations they expose exploitation of guardian beasts, gathering the Life, Deep Sea, Gale and Holy Flame cores. Sorren dies; Ian betrays them. Kael, broken, is possessed by the dragon, who wages war on the old order.