The Ultimator is the personification of the 10th dimension.The "Ultimate" dimension of all. It is the material manifestation of implicate/explicate reality. It is what can be, what should be, what would be, what might be - and what is, of course. It is its destiny to ingest all other dimensions and lifeforms - to make them part of itself.She feeds on other dimensional imps like the 5th Dimensional imps.
Ultimator is one of the most powerful entities in the DC multiverse, being a living embodiment of the 10th dimension, it is a predator that can devour entire realities and has sufficient might to overpower even the nigh omnipotent "magic" of the Fifth-Dimension Imps.