"Naturally, an undead monster would form a soul core through a long passage of time. However, the most common undead monsters were skeletons who did not need such a long time to form an undead monster's soul core. At most it was five or so years and at least one or so years to a couple of months. That is the reason why skeletons were easily formed and a collective graveyard was created.
Once, now and then, the lord of the local militia would take care of the growing undead. Of course, this is also one of the best revenue for a lord and also one of the worst nightmares for the villagers or commoners whose houses were near the graveyard. Some devious lords do not care for the lives of the commoners and would usually be the key start of an undead monster wave. A considerable amount of damag
