Devil's Tail (악마꼬리)

Struck by an enemy’s arrow, the powerless Prince Davey O’Rowane falls into a coma. His soul travels to a place where the greatest of the great gather — the honorable Hall of Heroes. There, a thousand years pass as Davey undergoes excruciating training under their watchful eyes to become a hero too strong for his own good. Now back to his timeline and his kingdom, he’s wide awake and the enemies hiding in the king’s court better be prepared - the prince they had dismissed is now their biggest threat!