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A Mulliboom is another alternate form of the Mulligan. It was added in the Wrath of the Lamb DLC and is commonly found in the Cellar, occasionally in The Catacombs and rarely in Necropolis.

Behavior

Mullibooms have a bomb wedged into the right side of their head and cry blood rather than actual tears. Instead of avoiding the player like their other variants, they will charge at Isaac and explode on contact, dealing 1 half heart of damage. They also explode immediately if they are killed, similar to Boom Flies. Make sure to keep a safe distance when delivering the final shot, and consider killing them next to a wall that might be adjacent to the Secret Room.

Champion Variant

Eternal Mullibooms will fire two explosive green shots that leave creep behind upon exploding while chasing the player

This variant was added in the Eternal Edition update but exclusively encountered in Hard Mode.

Trivia

  • Originally, explosions from Mullibooms inflicted one full heart of damage. After many complaints about layouts where avoiding damage seemed impossible (which on the Basement often resulted in frustrating deaths), Edmund reduced their damage to 1/2 heart. This makes their explosions the only kind that does not inflict a full heart of damage.
Monsters
Fly.png
Black Fly
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Attack Fly
Moters.png
Moter

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Eternal Fly
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Pouter.png
Pooter

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Fat Fly
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Boomfly.png
Boom Fly
Spitfly.png
Red Boom Fly
Gaper.png
Gaper

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Frowning
Gaper

Green gaper.png
Gurgle
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Shape4336.png
Mr. Maw
Mulligan.png
Mulligan
Mulligoon.png
Mulligoon
Mulliboom.png
Mulliboom
DLC.png
Hive.png
Hive


Pacer.png
Pacer
Gusher.png
Gusher


Hopper.png
Hopper

FHopper.png
Flaming
Hopper


Leaper.png
Leaper
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Vis

Vis Fio.png
Double Vis
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Chubby Vis.png
Chubber
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Sucker.png
Sucker

Puffer.png
Spit
DLC.png

Black spider.png
Spider
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Big spider.png
Big Spider
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Spider hopper.png
Trite
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Maggot.png
Maggot
Charger.png
Charger
Spity.png
Spitty
Globin.png
Globin

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Gazing
Globin
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Knight

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Selfless
Knight
Horfs.png
Horf
Maws.png
Maw
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Red Maw

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Psychic
Maw

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Boil.png
Boil

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Gut
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White boil.png
Sack
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Clotty.png
Clotty

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Clot


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I. Blob
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Eye.png
Eye

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Bloodshot
Eye
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Host
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Red Host
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Baby
Angel baby.png
Angelic Baby
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Avarice.png
Keeper
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Hang man.png
Hanger
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Pokies.png
Poky

Spike trap.png
Slide
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Brain.png
Brain
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Membrain
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Guts
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Mama Guts
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Leech

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Kamikaze
Leech

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Holy
Leech

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Parabite.png
Para-Bite
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Swarmer
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Mask Heart.png
Mask + Heart
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Centipede.png
B. Licker
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Fred.png
Fred
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Lump
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Embryo
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Dople
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Twin Evil
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Stone Grimace

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Vomit Grimace
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