The Binding of Isaac Wiki

Xxx form2 Isaac Rebirth Keeper sprite

The Hollow (ザー・ホロー Zā Horō) is the posthumous version of the boss Larry Jr. that spawns in the Catacombs.


It consists of two enemies - one with 4 segments and one with 5; each flies diagonally across the screen.

The movement of the boss resembles that of Fistula, though each segment can change the angle at which it bounces around the room, making dodging more difficult. The segments can be damaged and destroyed individually like with Larry Jr., which causes piercing tears to be very effective against him. If the room is filled with rocks, players may find themselves having a hard time dodging the Hollow, as the rocks will block player's movement (unless the player can fly), while the Hollow can fly over them.

Like with Larry Jr, each of the Hollow's segments are destroyed separately, therefore using The Necronomicon will instantly kill the Hollow.

The Hollow has a higher chance of appearing if you've killed Larry Jr before.

Champion Variants[]


Hollow yellow

Each segment drops a coin when destroyed. Being hit by this variant of The Hollow will cause Isaac to drop coins.


Hollow black

Each segment spawns a Boom Fly when destroyed.


Hollow green

Shoots a row of three bullets as an additional attack. Each segment spawns a Charger when destroyed.


Eternal Hollow

This variant of the Hollow moves in a slightly altered pattern. It bounces off walls as usual, but also tries to chase Isaac by curving toward him. Each segment spawns a random amount of Attack Flies, Pooters or Fat Flies when destroyed. Much like Eternal Larry Jr, if its head is the only segment, it will move at 1/2 of its original speed and leave creep on its trail, though it will directly pursue Isaac rather than wandering around the room. It will not gain new segments.



  • Sometimes, the green champion variant of The Hollow will use Larry Jr.'s head sprite when firing blood shots.
    • Similarly, the green champion variant of Larry Jr. will use The Hollow's head sprite when firing blood shots.
  • When the head of the Hollow spawns, the guts of a Host will be visible underneath, but will disappear after the smoke fades.


  • The Hollow has the most amount of Champion Variants out of any boss in the game.
  • In Rebirth, its head's HP has been reduced to the same as its body.



Magdalene vs. The Hollow - TBoI 1.333 Petden

The Hollow fight

Standard Bosses Dukeofflies fullThe Duke of FliesGemini fullGemini260x185-400px-Monstro.svgMonstroLarryjr fullLarry Jr.FistulaFistulaGurdy fullGurdyPeep FullPeepChubChubLoki fullLokiScolex fullScolexBlastocyst fullBlastocystTheFallen FullThe Fallen

Wrath of the Lamb DLC: 260x200-400px-Widow3WidowPin cleanPinMask of InfamyMask of InfamyGurdjrGurdy Jr.VS DaddyLonglegsDaddy Long Legs

Posthumous Bosses 285x230-MonstroII fullMonstro II

Wrath of the Lamb DLC: The HuskThe Husk260x220-The Hollow2The Hollow250x200-Teratoma.TeratomaLokii cutoutLokiiBlighted ovumBlighted OvumCarrionqueenThe Carrion QueenThe WretchedThe WretchedBc BloatThe Bloat

Alternate Bosses 287x265-Steven FullsizeStevenChub fullC.H.A.D.Gish fullGish

Wrath of the Lamb DLC: 200x300-400px-Triachnid boss portraitTriachnid

Harbingers 220x287-Isaac Vs famine edited- noobletkFamineBC PestilencePestilenceBC WarWarVSDeathDeath230x200-Headless HorsemanHeadless Horseman

Wrath of the Lamb DLC: BC ConquestConquest

Final Bosses 250x250-400px-MomMomMoms Heart FullMom's Heart250x250-ITLIVEScutoutIt LivesSatan FullSatan

Wrath of the Lamb DLC: Bc isaacIsaacBC xxx???