Judging from its first use (CleaningWardsWiki) and from the most appopriate "like" (WikiIsMagic) I'd say that WikiMagic is the serendipitous way things-Wiki take shape ... by way of WikiGnomes who RefactorMercilessly.
Hmm, I have a faint memory of a page like this (with something with magic in the title) that explained about WikiPages that have a fixed piece of content (editable off-course), but a following piece of content generated on the spot, I think an example is RecentChanges. -- StijnSanders