Board Thread:Versus Battles/@comment-26517929-20160807110225/@comment-28817306-20160807140826

Hmmm... For example, the room is dark. If you're anywhere near or in that dark room, Xanix can freely destroy your soul whenever he wants to. This includes the darkness in space, himself or the darkness he can release, which can be anywhere in the same dimension below.

Here, http://fcoc-vs-battles.wikia.com/wiki/Xanix_Hikari give it a read.