Maximum efficiency

Exploration Stage: Borderland
From: Yuri
Description: I was able to pick up the vibrational frequency of the melody to drive away the fog, so it's ready to play now. But Vila is still adjusting the amplifiers. She says she needs artifacts to get maximum efficiency. Can you lend me some of them?
Completed: I feel the melody ringing and resonating through the city. The lyre glowed mysteriously and shattered into sparks! But the music has driven away the fog that covered the neighborhood!