Mom

Base HP	Stage HP
645	0

Ingame Appearance

Entity ID
45.0

Found In
Boss




If an I AM ERROR room is used on The Depths/Necropolis/Dank Depths II

Dropped Items
The Polaroid and The Negative
Random Boss item if neither are unlocked
Void Gateway if unlocked (5% Chance, Requires +10 Damage or +20 Items)

This article is about the boss. For the transformation, see Yes Mother (Transformation). For other uses, see Mom (Disambiguation).

Mom is the boss that appears on the second floor of Chapter 3 ( The Depths, Necropolis, Dank Depths), and the final boss of the Epilogue.

• She also appears as a stronger version on the second floor of Chapter 3.5 ( Mausoleum, Gehenna).

Behavior

Mom appears in a unique boss room that has a boss door in the center of all sides of the room. Mom can use these doorways to perform various attacks:

• Stomps on Isaac's position, damaging nearby enemies and destroying obstacles. This attack is telegraphed by a growing shadow and her grunting.
  • She always begins the fight by stomping in the center of the room.
  • The foot itself does no contact damage.
    • Changed to deal contact damage in Repentance.
• If Isaac is near a door, Mom reaches in with her hand, dealing contact damage.
• Sticks out a piece of flesh from a door and spawns a Monster:
  • Gusher
  • Frowning Gaper
  • Globin
  • Attack Fly
  • Pooter
  • Mulligan
  • Maggot
  • Charger
  • Horf
  • Maw
  • Red Maw
  • Clotty
• Sticks an eye out of a door, which does not attack but can deal contact damage.
• Upon Defeat, all enemies spawned by Mom die alongside her, except for Globins, which collapse into piles of goo.

All of her attacks deal a full heart of damage.

Only Mom's stomp attack deals a full heart of damage under normal conditions, all other attacks do a half heart.

Behavior in Mausoleum/Gehenna

A stronger version of Mom can be fought on the second floor of Mausoleum and Gehenna, which has variations to her attacks:

• Stomps on Isaac's position, damaging nearby enemies and destroying obstacles.
  • She always begins the fight by stomping in the center of the room, just like in Chapter 3.
• Stomps 3 times on Isaac's position in rapid succession, with the third stomp releasing explosions in the cardinal directions.
• Sticks an eye out of a door, and if Isaac is in line of sight, it shoots 2 Brimstone beams in a helix pattern towards the door on the opposite side.
• Sticks out a piece of flesh from a door and spawns a Monster:
  • Attack Flies
  • Cursed Globins
  • Fetal Demons
  • Rag Man's Raglings
  • Suckers
  • Psychic Horfs
• Unlike in Chapter 3, Mom never uses her hand attack.
• Upon Defeat, all enemies spawned by Mom die alongside her, except for Cursed Globins, which collapse into 2 piles of goo.

Champion Versions

• Blue: Has 793.4 HP (23% more), summons monsters more often and summons a different variation of enemies that were added in the Wrath of The Lamb expansion of the original game, which are:
  • Spider
  • Big Spider
  • Trite
  • Buttlicker
  • Keeper
• Red: Does not summon monsters at all, and instead constantly uses her foot stomp, which has increased speed. Her eyes can shoot three blood shots in a spread formation at Isaac when they emerge, and she uses her hand much more often.

Gallery

• 

  Mom's leg in-game.

• 

  Mom's flesh in-game before Repentance.

• 

  Mom's hand before Repentance.

• 

  Mom's eye before Repentance.

• 

  Blue Champion Mom's leg before Repentance.

• 

  Blue Champion Mom's flesh before Repentance.

• 

  Blue Champion Mom's hand before Repentance.

• 

  Blue Champion Mom's eye Before Repentance.

• 

  Blue Champion Mom's boss door.

• 

  Red Champion Mom's leg before Repentance.

• 

  Red Champion Mom's flesh before Repentance.

• 

  Red Champion Mom's hand before Repentance.

• 

  Red Champion Mom's eye before Repentance.

• 

  Red Champion Mom's boss door.

• 

  Mom as one of Delirium's forms.

• 

  Mom's appearance in Mausoleum and Gehenna.

Unlockable Achievements

• 

  The Womb - Defeat Mom.

• 

  The Harbingers - Defeat Mom.

• 

  A Cube of Meat - Defeat Mom.

• 

  Purist - Defeat Mom.

• 

  XXXXXXXXL - Defeat Mom.

• 

  SPEED! - Defeat Mom.

• 

  Have a Heart - Defeat Mom.

• 

  PRIDE DAY! - Defeat Mom.

• 

  Onan's Streak - Defeat Mom.

• 

  The Guardian - Defeat Mom.

• 

  Aprils fool - Defeat Mom.

• 

  A Halo - Defeat Mom, Mom's Heart or It Lives using The Bible.

Notes

• Defeating Mom for the first time changes the current savefile's image.
• Using The Bible item during the Mom boss fight kills her instantly and unlocks The Halo.
• Using The High Priestess card during the fight with Mom results in Isaac being stomped instead of the enemy with the highest health.
  • Though, if done correctly, one could kill Mom in one hit by using the card while next to Mom's leg.
• Mom's stomp attack counts as a bomb; this means Isaac can be immune to it with Pyromaniac or Host Hat.
  • With Pyromaniac, Isaac can be healed when stomped.
  • Red Champion Mom is greatly negated with Pyromaniac or Host Hat.
    • Mom's stomp attack now deals contact damage, causing immunity to explosions to no longer avoid damage from the stomp.
• Mom cannot damage herself with her stomp attack.
• Midas' Touch causes Mom's foot to be turned into gold before it lands.
• The Polaroid is always to the left and The Negative is always to the right, in case Curse Of The Blind is active.

Trivia

• In The Binding of Isaac: Four Souls rendition of Credit Card, the name "Magdalene O. Moriah" can be seen carved in the credit card. The name was reused on Four Souls+ rendition of Divorce Papers. Edmund has confirmed that this is indeed Mom's full name.
  • The initials happen to spell out "M.O.M.".
  • This is further confirmed in-game during the background conversation during the Ascent.
    • The last name "Moriah" is likely a reference to the biblical location of the same name. In the bible, it is said that Moriah is where Abraham almost sacrificed his son before God sent an angel to stop his hand.
• According to Edmund, the occupations of Mom and Dad are stay-at-home mom and handyman respectively.
• Mom is voiced by Carla Kihlstedt.
• Mom appeared in the original The Binding of Isaac.
  • In the original, Mom's voice was provided by Patty Allen-Scott
  • Mom's Leg originally dealt a full heart of damage.
  • Unlike in Rebirth, Mom would shout "Isaac!" whenever she exposed her eye.
• Mom is the only final boss that has Champion variants.
• Using the The Bible and killing Mom instantly is a reference on how a bible hits her head in the epilogue of the game, knocking her out or killing her.
• During the versus screen, the "Isaac!" line from Mom can be heard, despite the battle not starting yet. She is one of seven/ five bosses that can be heard during the versus screen; the other six/ four are Big Horn, The Stain, The Forsaken, Mom's Heart, It Lives and Mother.
• If Isaac gets hurt by Mom, she will laugh.
• The skirt she wears on her in-game sprite is difficult to see in regular play, as her leg extends past the screen. Using the Dataminer or the Meat Cleaver can make the skirt visible.
  • Delirium's Mom form appears to wear a pile of flesh and organs rather than a skirt.
• Defeating Mom for the first time causes mods to no longer disable achievements.
• Prior to Booster Pack #5, Globins spawned by Mom could turn into Dank Globins if she was fought in Dank Depths.
• When she is fought in Mausoleum, her leg appears to be in a much more sickly state; with many varicose veins lining it.
• Mother could be considered as her posthumous version.