I've been wandering through the tags, offering a wiki improvement here and there, when I came across the tag of.
The tag was originally used for this question where the individual tags gospel, mark, of were listed — the OP apparently just typing along a series of keywords and not paying any attention to how the tags were being used or created (or even if they were the most relevant).
I updated the question (it's currently awaiting peer review), which was about a reference in the Gospel of Mark, to use the tag gospel-of-mark, which has released the tag of, which now has (after my edit has been peer reviewed) no associated questions.
I honestly can't think of a reason for the the of tag. Would it be appropriate for the mods to remove it?
EDIT: Ditto the tag body, which currently has no associated questions.