From DoomWiki.org

Battlemode maps

Celestial is one of the Battlemode arenas in Doom Eternal. It is themed after the Urdak level, featuring Maykr architecture and pink trees. A giant laser from the sky occasionally sweeps through the arena, damaging anything it touches.

"Orbiting data structure of the sentient Maykr Godmind, the Transfigurations of fallen Maykrs are processed here and re-inserted into the Maykr soul-grid."