Rat Catcher's Flute

Using the Rat Catcher's Flute with a targetted and within range of the flute enthralls the rat.

Source
This item is provided for.

Rat Catcher's Flute as a quest objective
This item is an objective of. You cannot complete the quest if you discard the flute; you would have to abandon the quest and start over.

Five Enthralled Deeprun Rats, created by using the flute on five Deeprun Rats, are the other objective of the quest.

Trivia
The Rat Catcher's Flute and quest is an homage to The Pied Piper of Hamelin.