The typical Monster Spawner of the Betweenlands has a unique, animated spinning model, as well as its own particle effect, and can be found in certain Betweenlands structures. It acts like any Monster Spawner, and can have different mobs applied to it depending on the structure type.
- Druid Circle: Dark Druid
- Shrine and Underground Oasis: Swamp Hag, Wight, Blood Snail, Leech, Termite
- Tar Pool Dungeon: Tar Beast (This spawner is disguised as a Solid Tar block)
- Cragrock Tower and Wight Fortress: Swamp Hag, Wight, Chiromaw, Pyrad, Termite