Lord of Beasts: The Stable Boy They Called Cursed

Expelled stable hand Rowen believed his blood drove spirit beasts mad. After saving a black winged foal, he learns the truth: the Staff of All Beasts chooses him, all nine Trial Pillars light, and his lost royal bloodline awakens. He uncovers the Sacred Court's Dark Pact plot to drain every beast's power, then awakens the Heart of All Beasts and wins the four Primordial Guardians' allegiance.