He turned aside therefore at Sauron’s isle, as they ran northward again, and he took thence the ghastly wolf-hame of Draugluin, and the bat-fell of ThurIngwëthil. She was the messenger of Sauron, and was wont to fly in vampire’s form to Angband; and her greatfingered wings were barbed at each joint’s end with and iron claw. Clad in these dreadful garments Huan and Lúthien ran through Taur-nu-Fuin, and all things fled before them.
– The Silmarillion
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