Worm

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Disambig.png This article is about the monster. For trinkets, see Category:Worms.

Round Worm[edit | edit source]

Round   Worm
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
244.0
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
Challenge Room Icon.png

A round worm is a type of enemy which will periodically burrow into the ground and pop up in different part of the room. If Isaac is in their line of sight when that happens, it will spit a blood shot in his direction.

Roundy[edit | edit source]

Roundy
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
276.0
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
Added in Afterbirth

Like the Round Worm, a Roundy will burrow into the ground and appear somewhere else. When it surfaces, it releases a small rock wave around it and fires an 15►Ipecac Ipecac shot towards Isaac.

  • If multiple Roundy's surface in the radius of their rock wave, they will kill each other.

Ulcer[edit | edit source]

Ulcer
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
289.0
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 Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
Added in Afterbirth

Like the Round Worm, the Ulcer will burrow into the ground and appear somewhere else. When it surfaces, if Isaac is within its line of sight, it will spawn a Dart Fly, but if there are 6 of them in the current room, it will start firing a blood shot instead. Ulcers burrow underground at a slightly slower rate than most other Worms, usually making them easier to attack.

Night Crawler[edit | edit source]

Night   Crawler
Entity image

Base HPStage HP
35
0
Table dividing line 1.png
Entity ID
255.0
Table dividing line 2.png
Found In
Stage The Cellar 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
Challenge Room Icon.png

Like the Round Worm, the Night Crawler will burrow into the ground and appear somewhere else. When Isaac is within their line of sight, they will fire four short-range projectiles that spiral outwards.

Tube Worm[edit | edit source]

Tube   Worm
Entity image

Base HPStage HP
20
0
Table dividing line 1.png
Entity ID
255.1
Table dividing line 2.png
Found In
Stage Downpour.pngStage Dross icon.png
Stage Flooded Caves icon.png
Added in Afterbirth †

Tube Worms were added in Booster Pack #4.

Like the Round Worm, the Tube Worm will burrow into the ground and appear somewhere else. Upon popping out of the ground, they will fire a long-ranged arcing spray of shots at Isaac, attempting to intercept Isaac's future position based on his movement. Unlike standard Round Worms, they can fire at Isaac even if they do not have a line of sight.

Fire Worm[edit | edit source]

Fire   Worm
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
825.0
Table dividing line 2.png
Found In
Stage Mines icon.png
Added in Repentance

Fire Worms were introduced in The Binding of Isaac: Repentance.

Like the Round Worm, the Fire Worm will burrow into the ground and appear somewhere else. If Isaac is in their line of sight, they will fire a single flame at him. They can only appear in lava-filled gaps.

Tainted Round Worm[edit | edit source]

Tainted   Round   Worm
Entity image

Base HPStage HP
100
0
Table dividing line 1.png
Entity ID
244.2
Table dividing line 2.png
Found In
Stage The Basement icon.png
Found on the Ascent to Home Home.
Added in Repentance

Tainted Round Worms are much stronger and tankier versions of Round Worms. Like Round Worms, they will pop out of random locations in the floor, but the Tainted Round Worm does so alongside multiple tail ends. The head and all the tail ends will shoot Isaac together when he is in sight; while the tail ends each shoot a small blood shot, the head spits a large blood shot which will become 4 smaller ones upon contact with a wall or obstacle.

They are only found on the Ascent to Home Home.

Tainted Tube Worm[edit | edit source]

Tainted   Tube   Worm
Entity image

Base HPStage HP
100
0
Table dividing line 1.png
Entity ID
244.3
Table dividing line 2.png
Found In
Stage Downpour.png
Found on the Ascent to Home Home.
Added in Repentance

Tainted Tube Worms are a stronger variant of Tube Worms. After popping up in a random location, they spit 4 spread-out 15►Ipecac Ipecac shots in the direction of Isaac.

They are only found in Downpour Downpour during the Ascent.

Tips[edit | edit source]

Trivia[edit | edit source]

  • Round Worms are parasitic creatures in real life that can be found inside cats or dogs.
  • Nightcrawlers in real life could refer to earthworms, although they don't look similar to the Nightcrawlers from The Binding of Isaac.
  • Added in Afterbirth Ulcers are a reference to ulcers, breaks in bodily membranes caused by sloughing out of inflamed necrotic tissue.
  • Added in Afterbirth † Tube worms are creatures that live underwater and anchor their tails underground, which may be where the Tube Worm from The Binding of Isaac got its name from. However, they don't resemble real-life tube worms.
  • If a Tube Worm is spawned in a floor other than the Flooded Caves and Downpour, it will have a more Round Worm-like appearance with white skin (this can be seen naturally in Dross).

Bugs[edit | edit source]

Bug Bug! If the player kills and freezes a Tainted Round Worm using something like Ice Cube or Uranus, it will still deal contact damage upon attempting to push.

Gallery[edit | edit source]


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