The Red Quarrel

A mysterious arrow that Tuck Underbank found in the tomb of Othran the Seer. He had already been informed of its existence by Laurelin, who recited a prophecy indicating when the arrow should be used.

After being captured by Modru, Tuck realized that he needed to fire the arrow at the Myrkenstone. The arrow successfully destroyed the Myrkenstone, and killed Modru in the process.

Trivia

 * The term "quarrel" is incorrect, because Tuck at no point uses a crossbow.
 * Made out of an unidentified red metal.