This is the Cthulhu Christmas wreath created by Maika Keuben (of Cthulhu Christmas tree fame). It's the perfect wreath to let carolers know they've come to the wrong house to sing at. But by the time they realize it, it will be too late, and the tar and feathers will already be flowing from an open upstairs window.
Keep going for a slideshow of the entire build process.
Thanks to carey, who made a Christmas wreath that shoots fire and doubles as a hand-warmer.