Peryton
Perytons are mythical monsters resembling giant eagles with the heads of stags, who cast human shadows and eat human hearts... no, we're not making this shit up. Like many other crazy mythical monsters, they've shown up in Dungeons & Dragons, but have also made appearances in the Monsters and Animals supplement for the Palladium Fantasy Role-Playing Game.
Further Reading
You can find an exhaustive discussion of the Peryton's history in D&D, including naming all sourcebooks that refer to it, over here: http://www.enworld.org/forum/content.php?4552-Monster-ENCyclopedia-Peryton
Gallery
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1e
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AD&D Monster Card
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2e
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3e