After successfully upgrading his magic rod, Sein did not rest on his laurels. He took a short break, then dove straight into the next round of experiments with Leena.0

This time, he was going to improve the Demon Eye Mask.0

Laid out on his experimental table was a beautiful lavender divine relic that once belonged to the Goddess of Music.0

Beside it sat the Octave Box—an extremely rare octagonal divine artifact of sonido attribute.0

The Demon Eye Mask had incorporated some of Sein’s sonido elemental knowledge, which should have given it a good level of compatibility with the Goddess of Music’s divine relic and the Octave Box.0

However,...0