Glitching - Mass Spawning Zombies

The Necromancer is an interesting NPC. When attacked, it spawns a zombie, and does so 7 times before it can be attacked. However, the game developers seems to have allowed the 2 Necromancers located in the tower next to the Fight Arena to share the same "zombie spawned" flag, allowing you to simply spawn 7 zombies on the Necromancer, and without killing any zombies, go to the next floor and kill the other Necromancer.

This allows you to spawn a massive number of zombies at once. There's actually a limit to how much zombies the game can spawn. What happens once you reach the limit? Well, it gets interesting...