The Blacksmith You Dumped Is the Red Dragon King

Blacksmith Arthur is secretly the Red Dragon King. After five years funding fiancee Elaine's studies, she publicly crushes his ring and dumps him for Lord Kendrick. Princess Guinevere, fleeing a forced marriage to warlord Duke Fletcher, turns to Arthur. In palace halls and at the Holy Dragon Altar, he shows terrifying power yet hides his identity — until Archmage Merlin kneels and Arthur draws Excalibur, unleashing golden light and a spectral dragon's roar that shatter five years of silence.