No. A separate mod that allows you to specify a block in the config to turn into a "spawner" (similar to PE) with same config options on rate of spawn and mob list. Even more amazing if you could configure up to 8 blocks with their own independant rates of spawning and spawn lists. An alternative to vanilla mob spawners that can be hidden in plain sight and not affected by light levels. In my modpack, I have alien spires spawning around made from a couple of unique blocks, and they have vanilla spawners scattered about them, but it looks bad, and nothing spawns in the day.