Sacred Resonator

Exploration Stage: Moon Gate
From: Monk
Description: To banish the monster back to the world of demons, I'll use the sacred knowledge and fill the magic octagon with the energy of life. Combined with some firecrackers, it will amplify the explosion's sound, making it thunderous. The Professor said it's a resonator, take a look.
Completed: The union of a magic resonator and firecrackers should terrify the monste who's doomed to fear loud sounds. We only need to set off the explosion next to it.