A Celestial loot box that arrives as an exploding drum kit played by a demon and leaves behind one potion.
Carl earned this Celestial box while inside the demon's fist on the eighteenth floor and opened it in chapter 10. It appeared as a full-sized drum kit rolling across the Larracos guild hall with pyrotechnics exploding from both sides, the twin bass drums each bearing the face of Amayon. An ethereal demon creature sat behind the kit hammering the bass pedals and rolling on the snare, filling the room with constant speed-metal rhythm while Mongo screeched in terror and waved his half-regrown chicken wing.
The drum set then exploded, "666" formed in smoke and dissipated with a little electric guitar twiddle, and all that remained was the Hell-Kissed Celestial Skill Potion of the Prince of Woe. Princess Donut was unimpressed that all that theater produced only a potion; Mordecai shouted "Yes!" and nearly vibrated out of his skin.
A full-sized drum kit with twin bass drums painted with Amayon's face, wreathed in pyrotechnics, manned by an ethereal demon drummer.
The Celestial-tier prize that delivered Carl's demon skill potion.