The Unshaped are a dangerous threat, primordial beings with no defined body, they instead manifest as clusters of ideas that can take on a variety of forms at will. Their disregard for anything but their own personal goals and amusements make them very hard to reason with, to boot!
A little side bonus that comes with showing these off is that BREAK!!'s status ailments can be silly or quite scary, depending on the entity that's inflicting them!