This is one of the free PDFs offered for the Frostburn Horrors: Rimewind Secrets collection.

The Ballad of Bifask speaks of an ancient artifact said to possess wondrous powers and which disappeared long ago. The last tablet of the story has been found, directing treasure hunters and glory seekers to the Isle of Naluak in search of this relic! Will you have the courage to face the perilous dangers of the frozen north and defeat the Guardian of the Horn to claim its powers?