The Horn of Winter: will Joramuns Horn destroy the Wall?

In Game of Thrones and ASOIAF, Mance Rayder searches for the Horn of Winter, or Joramuns Horn, a legendary artef said to have the power to destroy the Wall. Where did it come from? What exly does it do? And where is it now?
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<br>This video contains major spoilers for Book 5 / Season 5.
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<br>Created with Adobe After Effects, a Wacom Intuos Pen Tablet, and a Blue Yeti USB microphone.
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<br>Images and video from Game of Thrones and Dr. Strangelove are the property of their creators, used here under fair use.
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<br>Thanks to the following Patrons:
<br>xandria lenert, @MrFifaSA, Cameron Weiss, @Vineyarddawg, Michael Appell, zyad aloqily, @AdamWritesPlays, Fred Petty, Jason Rattray, Madeline Cockrel.