Fly

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Fly
Entity image

Base HPStage HP
3
0
Table dividing line 1.png
Entity ID
13.0
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Stage Downpour.pngStage Dross icon.png
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage Mausoleum icon.pngStage Gehenna icon.png
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
Stage Cathedral icon.png
Treasure Room Icon.pngShop Icon.pngSecret Room Icon.pngSuper Secret Room Icon.pngSuper Secret Room Icon.pngSuper Secret Room Icon.pngBedroom Icon.pngBedroom2 Icon.png

Flies buzz around the room randomly. They cannot damage Isaac at all, even by touch, making them completely harmless. However, they can turn into Pooters if they fly around Poop for too long, or come in contact with a Golden Poop.

Attack Fly[edit | edit source]

Attack   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
18.0
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Stage Dross icon.png
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage The Womb icon.pngStage Scarred Womb icon.png
Stage The Chest icon.png
Challenge Room Icon.pngSuper Secret Room Icon.pngVault Icon.pngSuper Secret Room Icon.pngTreasure Room Icon.png

Attack Flies are Red and Black flashing flies that will follow Isaac relentlessly until killed. Their only way of damaging Isaac is by contact, and they move rather slowly, making them easy to kill. However, they can be dangerous when found in groups, as they can swarm around Isaac quickly.

Attack Flies turn into regular Flies if Isaac has 15►Skatole Skatole. However, they take a small amount of time to convert into Flies, so it is possible for Isaac to be damaged if the player is not careful.

Dart Fly[edit | edit source]

Dart   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
256.0
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Stage Dross icon.png
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Super Secret Room Icon.pngDice Room Icon.png
Added in Afterbirth

Dart Flies are similar to regular Attack Flies, but attempt to mimic Isaac's movements. Their only way of damaging Isaac is by contact, and they can move fairly quickly, making them potentially dangerous when found in groups.

Swarm Fly[edit | edit source]

Swarm   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
281.0
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Stage Dross icon.png
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Added in Afterbirth

Swarm Flies are similar to regular Attack Flies but appear in tightly-packed clusters. Their only way of damaging Isaac is by contact, and although they move fairly slowly, they can be dangerous by simply outnumbering Isaac.

Notes[edit | edit source]

  • If a Swarm Fly is separated from its group due to being petrified, it quickly moves back to its group once unpetrified.

Ring Fly[edit | edit source]

Ring   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
222.0
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
(Rarely)

Ring Flies are a new addition to Rebirth. They are pink flies that, upon entering the room, will cluster together into a circular formation and orbit rapidly while moving towards Isaac. They will hold formation even when you destroy all but one fly. The maximum amount of flies per formation is 10. These flies are fast and take up a large amount of space, so it may be recommended to hold these on higher danger priority.

  • Ring Flies are not affected by 15►Strange Attractor Strange Attractor and will continue to stay within their current circular formation.

Army Fly[edit | edit source]

Army   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
868.0
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage Burning Basement icon.png
Stage Dross icon.png
Stage The Caves icon.png
Stage The Depths icon.png
Stage Corpse icon.png
Added in Repentance

Army Flies are a new addition to Repentance. They are green flies that chase Isaac, moving in the cardinal directions as they do so. If there are other Army Flies in the room, they will form a single file line while chasing Isaac.

Hush Fly[edit | edit source]

Hush   Fly
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
296.0
Table dividing line 2.png
Found In
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
???
Added in Afterbirth

Hush Flies are mainly spawned by Hush and behave somewhat similar to Ring Flies, flying towards Isaac in certain patterns. Unlike Ring Flies, they can form other shapes such as polygons and can also orbit Hush.

Hush Flies have a brief period of invincibility when Hush spawns them, making them appear to have more health than they have.

Hush Flies are not affected by the Beelzebub Transformation.

Added in Afterbirth † Hush Flies can also rarely spawn outside of the Hush fight in rooms.

Moter[edit | edit source]

Moter
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
80.0
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png

Moters appear as two conjoined Attack Flies. They behave similarly to regular Attack Flies but split into two Attack Flies upon being killed. Their split is very wide and unpredictable and can easily shave off half a heart. It is recommended to kill faster flies and other small monsters before it, as the two flies it spawns are more dangerous in many ways. Running between them just as they split is also a very good way to dodge.

  • If Isaac has 15►Skatole Skatole or uses a bomb, killing a Moter will not make them split into two Attack Flies.

Eternal Fly[edit | edit source]

Eternal   Fly
Entity image

Base HPStage HP
NN
Table dividing line 1.png
Entity ID
96.0
Table dividing line 2.png
Found In
All Chapters
Treasure Room Icon.pngSecret Room Icon.pngVault Icon.pngSuper Secret Room Icon.png

The Eternal Fly is a white-colored fly that can be found on any floor in the game. They usually circle Corny Poop or enemies like Holy Leeches and Hangers, and will not stop circling them until their hosts are destroyed. Before that, they will deal damage to Isaac if he touches them, and they're completely immune to all forms of damage. When their hosts are destroyed, they convert into Attack Flies.

  • If Eternal Flies are circling Corny Poop and there are no other enemies around, you can leave the room at will. This is true even if they have already been converted into Attack Flies: they will simply disappear when you return into the room.

Willo[edit | edit source]

Willo
Entity image

Base HPStage HP
6
0
Table dividing line 1.png
Entity ID
96.1
Table dividing line 2.png
Found In
Stage Downpour.png
Stage Flooded Caves icon.png
Stage Cathedral icon.pngStage The Chest icon.png
Added in Repentance

The Willo is a fly introduced in The Binding of Isaac: Repentance.

Willos circle around isaac, moving with him perfectly, and firing shots inwards towards him. They circle quite quickly, and can be hard to hit.

Despite the seemingly unfair tactics they use, their shots are very easily avoidable by simply staying mobile, as their shots do not inherit momentum and will usually miss Isaac as long as he keeps on the move.

It's entirely viable to ignore them at first, simply moving in a small circle to dodge their attacks while dealing with other enemies first.

Sucker[edit | edit source]

Sucker
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
61.0
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
Stage Sheol icon.png

The Sucker has a greater amount of health than a regular Fly and slowly moves towards Isaac. Upon death, it shoots 4 bullets in all cardinal directions. Suckers are unaffected by 15►Skatole Skatole, so they're always hostile.

Despite their simplistic behavior, Suckers can prove to be rather dangerous at late levels. This is because they're often positioned in areas containing hazards, or the player may have familiars that attack the Suckers regardless of the player's intention. As a result, the low health that the Suckers possess can be used to give the player little time to react when they die quickly and shoot their projectiles outwards.

Spit[edit | edit source]

Spit
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
61.1
Table dividing line 2.png
Found In
Stage The Cellar icon.png
Stage The Catacombs icon.png
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
Stage Cathedral icon.png
Chance To Replace Suckers

The Spit looks like a green version of the Sucker, and it shoots one explosive green bullet at the player upon death. The shot behaves exactly like 15►Ipecac Ipecac. Spits are unaffected by 15►Skatole Skatole, so they're always hostile. Like most enemies that possess explosive attacks, Spits can be used to bomb tinted rocks or open Secret Rooms.

Soul Sucker[edit | edit source]

Soul   Sucker
Entity image

Base HPStage HP
18
0
Table dividing line 1.png
Entity ID
61.2
Table dividing line 2.png
Found In
Stage Sheol icon.png
Stage Dark Room icon.png
Stage Mausoleum icon.pngStage Gehenna icon.png
Challenge Room Icon.png
Added in Afterbirth †

Soul Suckers were added in The Binding of Isaac: Afterbirth †.

The Soul Sucker looks like a bloated, red-spotted version of the Sucker. Upon death, a swirling red vortex appears where it died, which then fires four 15►Brimstone Brimstone beams in the cardinal directions after a short delay.

The appearance of the vortex resembles the same vortex that is spawned whenever the player fires with 15►Brimstone Brimstone and 15►Anti-Gravity Anti-Gravity.

Ink[edit | edit source]

Ink
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
61.3
Table dividing line 2.png
Found In
Stage Mines icon.pngStage Ashpit icon.png
Stage Dank Depths icon.png
Challenge Room Icon.png
Added in Repentance

Inks were added in The Binding of Isaac: Repentance.

The Ink is simply a tar variant of a Sucker. Upon death, instead of shooting four blood shots in the cardinal directions, it shoots four tar shots in the ordinal directions as well as a puddle of slowing black creep.

Mama Fly[edit | edit source]

Mama   Fly
Entity image

Base HPStage HP
44
0
Table dividing line 1.png
Entity ID
61.4
Table dividing line 2.png
Found In
Stage Corpse icon.png
Added in Repentance

Mama Flies are another new addition to The Binding of Isaac: Repentance.

They fly around the room away from Isaac and plant down Pustles. They spawn Small Maggots upon death.

Bulb[edit | edit source]

Bulb
Entity image

Base HPStage HP
10
2
Table dividing line 1.png
Entity ID
61.5
Table dividing line 2.png
Found In
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Stage Downpour.png
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Stage The Depths icon.png
Secret Room Icon.png
Added in Repentance

Bulbs are enemies added in The Binding of Isaac: Repentance. They fly in erratic, right-angled motions.

If Isaac has an active item with at least one bar of charge, they fly towards him and drain the item's charges upon contact, but do not deal damage.

  • Bethany's soul charges cannot be drained by them.

If Isaac does not have an active item, or if his item has no charges, they simply fly randomly and are completely harmless.

Bulbs replace the Greed Gaper in treasure rooms.

Bloodfly[edit | edit source]

Bloodfly
Entity image

Base HPStage HP
6
1
Table dividing line 1.png
Entity ID
61.6
Table dividing line 2.png
Found In
Stage Corpse icon.png
Added in Repentance

Bloodflies are enemies added in The Binding of Isaac: Repentance. They behave very similarly to Bulbs in movement.

Bloodflies are spawned by Pustules if they are destroyed after reaching maximum size. Bloodflies chase Isaac, and, upon death, shoot 4 blood shots in the cardinal directions.

Tainted Sucker[edit | edit source]

Tainted   Sucker
Entity image

Base HPStage HP
14
1
Table dividing line 1.png
Entity ID
61.7
Table dividing line 2.png
Found In
Stage The Caves icon.png
Found on the Ascent to Home Home.
Added in Repentance

Tainted Suckers are larger and more corrupt versions of Suckers. Upon death, they shoot 6 large blood shots that become 6 smaller shots upon contact with a wall or obstacle.

They are exclusive to the Ascent to Home Home.

Fly Bomb[edit | edit source]

Fly   Bomb
Entity image

Base HPStage HP
7
0
Table dividing line 1.png
Entity ID
254.0
Table dividing line 2.png
Found In
Stage Mines icon.pngStage Ashpit icon.png
Added in Repentance

Fly Bombs are enemies added in The Binding of Isaac: Repentance. They are characterized by their appearance of a small Bomb with wings.

They chase Isaac, attempting to circle around him as they do so. Upon death, they turn into a tiny Bomb that explodes shorty after.

Eternal Fly Bomb[edit | edit source]

Eternal   Fly   Bomb
Entity image

Base HPStage HP
n/a
0
Table dividing line 1.png
Entity ID
819.1.0
Table dividing line 2.png
Found In
Stage Gehenna icon.png
Spawned exclusively by The Horny Boys.
Added in Repentance

Eternal Fly Bombs are enemies added in The Binding of Isaac: Repentance.

They orbit Boom Flies spawned by The Horny Boys. They are immune to all damage until their respective Boom Fly dies. Then, they turn into tiny Bombs that explode shortly after.

Gallery[edit | edit source]

Notes[edit | edit source]

  • The Duke of Flies can spawn larger versions of Attack Flies that have 10 Base HP.
  • Gurdy can spawn weaker versions of Attack Flies that only have 3 HP.
  • Eternal Flies can be killed by Chaos Card Chaos Card, 15►Little Horn Little Horn and 15►Euthanasia Euthanasia.
  • The Brimstone lasers from the Soul Suckers can damage other enemies, including other Soul Suckers. You should play carefully when facing multiple Soul Suckers, as their vortex attacks could corner you if you're not careful.

Trivia[edit | edit source]

  • The Black Fly has the lowest health of any enemy in the game, tied with the Added in Afterbirth Corn.
  • There is a fly enemy (popularly known as the Ball of Flies) in the Eternal Edition of the original The Binding of Isaac that is a ball of 4 Attack Flies, resembling 2 Moters stuck to each other. This enemy does not appear in Rebirth, likely due to being added in said Eternal Edition update that was added a while after the release of Rebirth.
  • Suckers seem to be based on mosquitoes, midge-like flies that suck the blood of other animals, as they seem to share a small proboscis and blood sac.
  • In a Q&A Reddit thread by Edmund McMillen, Edmund McMillen confirmed that the species of flies in The Binding of Isaac are house flies and botflies.
  • Soul Suckers have been added in Booster Pack #4, after the initial release of the DLC.


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