Neuron Fly

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This section contains major plot details from the "LttM" region and beyond. If you have not progressed past this region, then read no further!
This section contains major plot details from the "5P" region and beyond. If you have not progressed past this region, then read no further!

"Neuron Fly"
Code name
In Looks to the Moon: Edible
In Five Pebbles: Edible, Swallowable
Food Pips

1 🌕 As MonkAs Survivor

0.25 🌘 As Hunter

✔️DLC1 🌕 As GourmandAs RivuletAs Saint

✔️DLC0.5 🌗 As Spearmaster

✔️DLC0.25 🌘 As Artificer

Locations (amount)
Five Pebbles
The Rot
Looks to the Moon
Respawn time
None (respawning not determined by time)

Neuron Flies are small, edible objects. They have two thin tails connected to an oblong body with a white center. They shift colors randomly through red, white, blue, or purple. They are prevalent in Five Pebbles and ✔️DLC Looks to the Moon​, and a small number can be found in Shoreline floating over Looks to the Moon's puppet.



Neuron Flies provide 1 food pip 🌕 (1/4 of a pip 🌘 as Hunter and ✔️DLC Artificer) when consumed and grant Slugcat the ability to glow for the rest of the campaign, providing visibility in dark regions. They can also be stored in Slugcat's stomach when all of their food pips are filled.

While the Neuron Flies in Shoreline Looks to the Moon do not respawn, the ones in Five Pebbles​ and ✔️DLC Looks to the Moon​ do as soon as the room is unloaded by going far enough away.

After eating a Neuron Fly, Void Spawn appear near Slugcat in certain locations. They are trapped in small 'eggs', and upon touch, they break free and slowly travel in a direction that leads from Shoreline Looks to the Moon to Shaded Citadel Memory Crypts, guiding Slugcat in the direction of Five Pebbles in place of the Yellow Overseer.

Looks to the Moon's Neuron Flies

When Looks to the Moon is found, five Neuron Flies are flying above her. Catching these Neuron Flies causes Looks to the Moon to shake her head frantically and try to talk to Slugcat. With the Mark of Communication, she urges Slugcat to let them go. Eating them makes her throw herself to the ground and jerk around. Eating at least one or hibernating with it earns the Stolen Enlightenment Achievement. Eating all of them kills Looks to the Moon. If Slugcat hibernates without eating or taking one of her Neuron Flies the cycle they find her, the A New Friend achievement is earned.

From then on, as long as Slugcat has not eaten any Neuron Flies, the yellow Overseer guides Slugcat to more Neuron Flies for Looks to the Moon. Following the Overseer takes Slugcat to Five Pebbles, in hopes that Slugcat delivers some to Looks to the Moon. If Slugcat has already eaten a Neuron Fly from Looks to the Moon, they can still find their way to Five Pebbles by following the aforementioned Void Spawn.

Looks to the Moon has the ability to read Pearls found in the world with any number of Neuron Flies above 0.

Green Neuron Fly

This section contains major plot details from Hunter. If you have not made significant progress or completed the game as Hunter, then read no further!

The green Neuron Fly projecting holograms

Hunter starts the game carrying a unique green Neuron Fly. This Neuron Fly cannot be eaten and can be stored in Slugcat's stomach at any time. If it lies on the ground for a few seconds, it starts hovering above the ground at the level of Slugcat's head and occasionally projects a complex hologram from its form.

When the green Neuron Fly is brought to Looks to the Moon, who is initially exhaustively incapacitated when Slugcat meets her, the green Neuron Fly reactivates her own Neuron Flies and brings her back to life. This is because the Neuron Fly holds 'slag keys'. Looks to the Moon became incapacitated because Five Pebbles deprived her of water, causing slag buildup which caused her processes to seize. The slag keys likely reactivated her water systems to flush out the slag and allowed her to become active again.

Spoilers end here.


  • Neuron Flies cease movement and lose the ability to fly while outside of Five Pebbles or Looks to the Moon, making it much easier to transport them between the two Iterators.
  • The only practical reason to deliver Neuron Flies to Looks to the Moon as Survivor or Monk is to receive bits of lore when she formats them, or to replace the Neuron Flies Slugcat ate.
  • Looks to the Moon still accepts partially eaten Neuron Flies.
  • Neuron Flies do not have a Sandbox item, similar to Noodlefly Eggs.
  • When playing as Gourmand, Looks to the Moon considers crafted Neuron Flies that are given to her to be formerly Five Pebbles's.