Radiant: Season 2, Episode 15

2 - 15: Led to the Abyss by a Melody of Death -Harmonizium-

The war between Cyfandir and the Inquisition is raging, and the anti-Fantasia device pushes the Knights-Wizards to their last entrenchments. In the basement of Caislean Merlin's castle, Seth tries to convince Diabal to join him.