Celestial Tower Mask

Celestial Tower Masks are Head-Slot Vanity items, dropped by the Solar Pillar, Vortex Pillar, Nebula Pillar,

and the Stardust Pillar, each with a 14.29% chance of dropping.

Solar Pillar Mask
The Solar Pillar Mask drops from the Solar Pillar, and resembles the Upper-Half of the Solar Pillar.

Vortex Pillar Mask
The Vortex Pillar Mask drops from the Vortex Pillar, and resembles the Upper-Half of the Vortex Pillar.

Nebula Pillar Mask
The Nebula Pillar Mask drops from the Nebula Pillar, and resembles the Upper-Half of the Nebula Pillar.

Stardust Pillar Mask
The Stardust Pillar Mask drops from the Stardust Pillar, and resembles the Upper-Half of the Stardust Pillar.

Trivia:

 * The Celestial Tower Masks are the only Masks dropped by Event-Bosses.