Spawner mobs seem to spawn just about anything that is referenced by the Special AI config. They seem to stick to a particular mob type for a while, then switch to another. Since I added things like Ars Magica's hell cows and elementals to the special AI list, that means that they occasionally get some pretty nasty mobs coming from the spawer mobs.

Any chance that I can force Spawer mobs to only spawn mobs from a specific list?