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Mom is the boss that appears on the second floor of Chapter 3 (Error: The given stage ("The Depths") does not exist., NecropolisNecropolis, (except in Rebirth) (except in Rebirth)Dank DepthsDank Depths), and the final boss of the Epilogue.

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.
  • 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:
  • 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.

(except in Repentance) All of her attacks deal a full heart of damage.

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

(in Repentance) Behavior in Mausoleum/Gehenna

A stronger version of Mom can be fought on the second floor of (in Repentance)MausoleumMausoleum and (in Repentance)GehennaGehenna, 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 Collectible Brimstone iconBrimstone 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:
  • 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 Needs to be unlocked

  • 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:
  • 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

Unlockable Achievements

Notes

  • Defeating Mom for the first time changes the current savefile's image.
  • Using Collectible The Bible iconThe Bible item during the Mom boss fight kills her instantly and unlocks Collectible The Halo iconThe 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 Collectible Pyromaniac iconPyromaniac or (except in Rebirth)Collectible Host Hat iconHost Hat.
    • With Collectible Pyromaniac iconPyromaniac, Isaac can be healed when stomped.
    • Red Champion Mom is greatly negated with Collectible Pyromaniac iconPyromaniac or (except in Rebirth)Collectible Host Hat iconHost Hat.
      • (in Repentance) 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.
  • Collectible Midas' Touch iconMidas' Touch causes Mom's foot to be turned into gold before it lands.
  • Collectible The Polaroid iconThe Polaroid is always to the left and Collectible The Negative iconThe 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 (in Afterbirth † and Repentance)Collectible Divorce Papers iconDivorce Papers. Edmund has confirmed that this is indeed Mom's full name.
    • The initials happen to spell out "M.O.M.".
    • (in Repentance) This is further confirmed in-game during the background conversation during the Ascent, where Dad calls Mom "Maggy" as he tells her to shut up.
      • 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 Collectible The Bible iconThe 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 (except in Repentance) seven/(in Repentance) five bosses that can be heard during the versus screen; the other (except in Repentance) six/(in Repentance) four are Big Horn, The Stain, The Forsaken, (except in Repentance) Mom's Heart, (except in Repentance) It Lives and (in Repentance) 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 (in Afterbirth † and Repentance)Collectible Dataminer iconDataminer or the (in Repentance)Collectible Meat Cleaver iconMeat Cleaver can make the skirt visible.
    • (in Afterbirth † and Repentance) Delirium's Mom form appears to wear a pile of flesh and organs rather than a skirt.
  • A disembodied version of Mom's leg stomp attack can be summoned as apart of the effects of II - The High PriestessII - The High Priestess, (in Afterbirth † and Repentance)Collectible Broken Shovel 1 iconBroken Shovel, and (in Repentance)II - The High Priestess?II - The High Priestess?.
  • (in Afterbirth † and Repentance) Defeating Mom for the first time causes mods to no longer disable achievements.
  • (in Afterbirth † and Repentance) Prior to Booster Pack #5, Globins spawned by Mom could turn into Dank Globins if she was fought in Dank Depths.
  • (in Repentance) When she is fought in (in Repentance)MausoleumMausoleum, her leg appears to be in a much more sickly state; with many varicose veins lining it.
  • (in Repentance) Mother could be considered as her posthumous version.


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