Disembodied voice from Japanese folklore
Facts from Wikidata Q249470 (CC0) · Wikipedia.
Wikidata describes Uwan as: disembodied voice from Japanese folklore.
This work includes material taken from the System Reference Document 5.1 ("SRD 5.1") by Wizards of the Coast LLC and available at https://dnd.wizards.com/resources/systems-reference-document. The SRD 5.1 is licensed under the Creative Commons Attribution 4.0 International License. Mythology and video game character facts from Wikidata (CC0). Name roots from Wiktionary (CC BY-SA 4.0).