Magic Boomerang

During the Gargoyle War, the gargoyles realized that their normal boomerangs weren't powerful enough to do any real damage. Thus, they developed the magic boomerang, which is more precise and more powerful than a normal boomerang, and can even fly through walls. It appears in Ultima VII.

Description
The Avatar ended the war before these weapons were introduced to the battlefield.

By the time of the Fellowship, the weapon had been nearly forgotten, with even the gargoyles themselves having lost interest in it. Only a few magic boomerangs still exist. One is still in possession of the gargoyles on Terfin. The only other one known to still exist is rumored to be in the dungeon Despise near 2N 21E.

Trivia

 * Despite its rarity, the magic boomerang isn't especially powerful. It actually is weaker than the standard boomerang.