Tale of the Cursed Swordsman, Infiltrating the Castle

Long ago, in an age forgotten by all, there was a tale of a hero, a legend of a warrior who fought hard to save a doomed land. He fought an unfavorable battle, for many years against a horde of undead, but no one knew where they came from, no one knew of their real motive. It was rumored to be a plague sent from the very being who watched over these lands. However, on one fateful day, this rumor proved to be falsehood, the culprit of this very act was none other than the king himself. The ruler of the land, which he himself had corrupted once he turned to the ways of necromancy.