Death of a Necromancer

The Low Rollers wandered up to the Necromancer's tower, and though beset by challenges, they defeated her without too much trouble.

Moments after the fall of the Necromancer. Just a simple stroll home now, right?

(The square to the right represents the first floor of the tower)

Then things got complicated. Although some of the skeletons crumbled into heaps of bones, all of those in or near the tower were freshly invigorated, gaining in strength. As the heroes tried to make their escape, new foes, ghouls and skeletons, flowed into the area. Was the spirit of the Necromancer still powerful and angry? Did the Necromancer's tower itself hold some sort of malignant magic? Was fate punishing the four heroes for their unjustified murder of an elderly practitioner of arcane magics who was simply pursuing her studies in a remote study in the wilderness?

By the time the valiant murder crew left the scene of their assassination, an amassed horde of 27 skeleton warriors and 8 ghouls had arrived on site.