Celestial Chests are chests that have a small chance to drop from open-world common monsters. Each Celestial Chest contains 3 items, varying based on the level and zone of the monster killed.
Monsters level 7 and below do not drop Celestial Chests.
Level 15 monsters do not exist, and level 16 common monsters have been tested not to drop Celestial Chests.
Level 30 and 31 common monsters do not exist.