Bab 57: 57: Chop Down the Sacred Tree! 

"Do-Re-Mi-Fa-So-La… Damn! I think I've got it!" 

Orson felt a jolt of realization course through him. His mind flashed back to the piano lessons he'd taken as a child at the orphanage. 

The six vertices of the hexagram—could they represent six musical notes? 

Combined with the ethereal melody echoing in his ears, it seemed the dungeon was guiding adventurers to harmonize across time with the Earth Elf Queen. Only by achieving this harmony could the unbreakable barrier be shattered. 

But one thing still puzzled him. 

Why had his earlier attacks been reflected? 

"Was it because I played the wrong note?" 

Testing his theory, Orson unleashed a [Explosive Fireball] in the same direction as before. 

The moment the fireball hit the barrier, the fire vertex of the hexagram lit up brightly, while the other five dimmed. 

"Holy crap!" 

Orson's eyes widened. "I'm a genius!"