This is a simple Random Enemy Spawner mod that I cooked up. It can be set to randomly replace, add, or both all enemies in a given level. You have the ability to configure how often this happens, as well as how often BIG enemies spawn in, and at what level. The monsters in this pack were gathered from many sources, mostly from Realm667. If you have the knowhow, you can add in your own monsters and edit the ACS script and add or remove monsters as you see fit. This should work on any mod. I recommend playing it with Nash's Gore mod, or Bolognese so you get that wonderful wonderful gibbing/blood.