Singing Sword

This blessed weapon loves nothing more than to sing to its owner, whether they want it to or not.

A golden long sword

Makes noise

Desirability

At high tension, its name changes to the Screaming Sword and starts screaming instead of singing. Its ear-splitting shrieks do minor damage to all nearby monsters, including allies (in addition to waking and attracting even more monsters than usual). When you are within the range of Silence, its name changes to Sulking Sword.

Despite what one might think from its description, this weapon is not holy wrath branded or even holy; "blessed" is merely a sarcastic synonym for "accursed" (i.e. annoying).