Probably a sigil 

Feast your eyes on this gorgeous drawing of “Anubis, Lord Of The Balance” that is the cover of one of the books lurking in my magic PDF collection.

(“At The Court Of Osiris”, by Terrence DuQuesne)

Probably a sigil 

@anthracite we were curious, so we duckduckgo'd, and apparently the book has been made available as a free pdf by the author/publisher:

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Dragon Style

I'm a grumpy queer dragon lady and this is my quiet cave for me and some friends.