User blog comment:Kylesides/Nihilikinesis - The Power of Nothingness/@comment-9893940-20130616163105

we should take a look at the pages for umbrakinesis and cryokinesis (the absence of heat), so that they might yield to you any clues concerning how to manipulate nothingness.

One logical way to think about this ability is to be able to manipluate "actual matter" outside of a given area, thus creating an area inwhich there is but void (i.e, a vacuum)