The given citation is ambiguous; there are two sourcebooks with the name "Umbra": Umbra: The Velvet Shadow and Umbra Revised. I'd appreciate if someone who owned the books would look into pages 98-99 of the books to see from which this article draws its information, and then switched "Umbra (disambiguation)" in the citation template with the correct title. Saslen (talk) 17:12, 23 October 2021 (UTC)
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