Magic Harp

The Magic Harp appears in  Ultima VII Part Two.

Description
The  magic harp is an item given to the Avatar by Mosh in Moonshade, after believing her story about Columna. It is a magical music instrument who has the effect to confuse the ratmen who live in the catacombs below the city. This will allow the user to passage through the territory without harm.

Trivia

 * Without the Magic Harp, they will attack the intruder.