Cave Fly

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Cave Fly
Cave Fly.png
Spawns In: The Mines
Floors: 1-29
Killable: Yes
Base HP: 22
Base Damage: 6
Base Def: 1
Speed: 2
XP: 10
Variations: Mutant Fly.png Mutant FlyCave Fly Dangerous.png Cave Fly (dangerous)
Drops: Ancient Seed.png Ancient Seed (0.5%)Bug Meat.png Bug Meat (90%)Dwarf Scroll I.png Dwarf Scroll I (0.5%)Dwarf Scroll IV.png Dwarf Scroll IV (0.1%)White Algae.png White Algae (2%)

If reached bottom of Mines:

Diamond.png Diamond (0.05%)Prismatic Shard.png Prismatic Shard (0.05%)

Cave Flies are an enemy monster found in The Mines. Cave Flies count towards the Monster Eradication Goal of 125 Cave Insects killed.

Grubs hatch into Cave Flies shortly after entering their cocoon phase, during which time they are invulnerable. Be sure to kill off a critically-hit Grub before it can enter its cocoon.


They fly at you (including through walls) at high speeds, damaging you on contact. Then they loop around for another pass.


Stand still and swing at them with a sword with high knockback right before it hits you.

A swarm event of Cave Flies (green mist) can easily overwhelm a low-level character, so it's advisable to carry enough stone to craft a staircase if you don't have an efficient weapon.


  • 1.0: Introduced.