Binding of Isaac: Rebirth Wiki

The Hollow is a boss that can appear in the CatacombsCatacombs.

It has (except in Repentance) 22 HP / (in Repentance) 26 HP per segment.

Behavior[ | ]

The number of individual The Hollow bodies that can spawn each fight can vary from 1-4. The most common encounter with The Hollow is with 2 bodies.

  • Flies around the room diagonally, bouncing off of walls.
    • The Hollow appears to travel faster when moving at vertical angles compared to horizontal.
    • The Hollow can change direction if it collides with Isaac.
  • Occasionally spawns poop while moving.
  • The Hollow's segments can be split into smaller copies of the boss as long as the new Hollow segments are longer than 2 pieces.

There is a chance that a GrubGrub can spawn alongside a shorter Hollow (basically replacing a second Hollow).

Champion Versions Needs to be unlocked[ | ]

Black: 15% larger, has slower movement and 25% more HP (32.5). Each segment that isn't the head spawns a Boom FlyBoom Fly when killed. Does not spawn any poop.
The head will spawn a Boom Fly only if killed immediately after spawning.
Yellow: 15% larger and has 25% more HP (32.5) but retains the same movement speed. Each segment that isn't the head will drop a PennyPenny on death.
The head will drop a penny only if killed immediately after spawning.
Green: Chance for each segment that isn't the head to spawn a ChargerCharger on death. Occasionally stops movement to shoot 3 bullets at wherever it is facing.
The head will spawn a Charger only if killed immediately after spawning.

Gallery[ | ]

Notes[ | ]

  • (except in Repentance)Poop spawned by The Hollow will never drop pickups, even when in possession of Petrified PoopPetrified Poop.
    • (in Repentance)Poops spawned by The Hollow have an incredibly low chance to spawn pickups. This chance is not affected by Petrified Poop.
    • Leaving the room and returning will make the poop generate pickups normally.
  • Piercing tears make fighting The Hollow much easier, as each tear can damage multiple segments.
    • (in Repentance) Piercing shots no longer damage segmented enemies multiple times per attack.

Trivia[ | ]

  • The Hollow was added in the Wrath of the Lamb DLC for the original The Binding of Isaac.
  • It is the posthumous version of Boss Larry Jr. ingameLarry Jr.
  • The definition of hollow is empty on the inside or surface, which could explain the boss's paleness and complexion.
  • The Hollow is the only boss that has three Champion versions.
    • In the V1.7.8 update, The Hollow's yellow Champion version was given a unique sprite that looks similar to (in Afterbirth † and Repentance) Boss Ultra Greedier ingameUltra Greedier.
  • The Hollow is the only regular boss that can be spawned by Mega Satan Head ingameMega Satan between thresholds.
  • (in Repentance) Despite Boss Larry Jr. ingameLarry Jr. receiving new body sprites in Repentance, and despite The Hollow's body sprites simply being recolors of Larry Jr.'s sprites, The Hollow's body sprites are unchanged in Repentance.

Bugs[ | ]

Bug Bug! (in Rebirth and Afterbirth) Sometimes this boss will get stuck in the wall when slowed.