Om Noms is done if you like the capstone. Iron Floof is up next.
Still don't much care for The Regurgitator being based off of a move action, which comes down to you having to ready to catch, which isn't exactly a good mechanic if you ask me. If it was an immediate action to catch, then it'll actually get used. I'd also have The Regurgitator use the Spell Turning limitations, as it's basically a slower version and should probably stick with what that can and can't do, like catching an area spell is probably not likely to happen if you're not at the epicenter.
On the Extradimensional Prison, how does it interact if the creature's you're capturing have extradimensional spaces, like Bags of Holding or Portable Holes? Do you suddenly have a rift to the Astral Plane in your stomach?