Moonglow Grotto is one of the three Chiseled Caverns that can be accessed through the purple portal in the Mining Facility in the Geode - Sanctuary. It is primarily colored purple, and features moon-themed items and resources.

It is populated by various Cave Critters which can be cared for in exchange for Lesser Crystal Caches, Blastflowers that explode on a timer when approached, and in Tier 2 and deeper, fire flowers that shoot projectiles that emit a gas that drains player GAS and N-Charge grow on the walls. Cave Milk appears in pools on the ground, which recharges N-Charge when players touch it.

Players can enter deeper tiers in the Moonglow Grotto by avoiding lairs until they find an airlock marked by flashing blue LED-lights. Deeper tiers contain different resources and increased amounts of Crystals, but more fire flowers.

Biome Colors

Element (R, G, B) # Color Primal Block
Path (Shade = Light) 133, 101, 206 8565CE Primal Purple small Primal Purple
- 113, 73, 199 7149C7 Primal Purple small Primal Purple
- 106, 64, 199 6A40C7 Primal Purple small Primal Purple
Path (Shade = Dark) 99, 55, 198 6337C6 Primal Purple small Primal Purple
Shelf (Shade = Light) 94, 44, 203 5E2CCB Primal Purple small Primal Purple
- 89, 38, 201 5926C9 Primal Purple small Primal Purple
Shelf (Shade = Dark) 85, 38, 189 5526BD Primal Purple small Primal Purple
Core (Wall) 57, 21, 137 391589 Primal Purple small Primal Purple
Core (Indestructible) 35, 13, 82 230D52 N/A
Crystal (Shade = Light) 211, 255, 167 D3FFA7 N/A
- 195, 255, 135 C3FF87 N/A
- 184, 255, 114 B8FF72 N/A
Crystal (Shade = Dark) 173, 255, 92 ADFF5C N/A



The following critters are indigenous to the Moonglow Grotto:

Critter Fresh Howlug Critter Sunkissed Froleek Critter Bouncy Hoppet Critter Zigzag Zepperay
Howlug Froleek Hoppet Zepperay


From Plants (Shared) From Ore Veins (Shared) From Plants (Unique) From Ore Veins (Unique) Other
Day Drop small Day Drop
Tiers 1-3
Gleamstone small Gleamstone
Tiers 1-3
Dream Dew small Dream Dew
Tiers 1-3
Moonstone small Moonstone
Tiers 1-3
Crystal small Crystal
All Tiers
Moonlit Moss small Moonlit Moss
Tiers 2-4
Builderite small Builderite
Tiers 3-5
Acrobat Bark small Acrobat Bark
Tiers 2-4
Quirkstone small Quirkstone
Tiers 3-5
Lesser Crystal Cache small Lesser Crystal Cache
from Critters
Wallflowers small Wallflowers
Tiers 4-5
Ancient Gears small Ancient Gears
Tier 5
Queen Trumpets small Queen Trumpets
Tiers 4-5
Lunarium small Lunarium
Tier 5
Glim small Glim
from non-resource plants
Bomb small Bomb
from non-resource plants


Like in other caverns, lairs spawn throughout the Moonglow Grotto behind plain doorways marked by signs. The end of each lair contains a large amount of resources corresponding with the tier (randomly either Crystals, Plants or Ores). Tier 2 and higher lairs can sometimes contain Bronze Companion Eggs (with higher chances of eggs spawning in higher tiers). Very rarely, Silver Companion Eggs can spawn in Tier 3 and higher (with higher chances of silver eggs spawning in higher tiers), and Gold Companion Eggs can spawn in Tier 5.

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