It was a duty for the knight to give a positive answer to this contract, a duty to save the population from the Cursed One and the Cursed One from himself, now a shadow of his own past as a beloved King. It was also a way to have a decent living in these medieval times.
But the knight knew that his own curse would never end until these abominations would disappear, and that he would rather lived an humblest but happiest life than this one.
(Inspired by the Witcher,
Used Photobash.org packs.)