Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

The Harbingers is the achievement that unlocks Famine, War, Pestilence and Death as four additional bosses. The Harbingers are referenced in the Bible as the Four Horsemen of the Apocalypse. These bosses are only unlocked once Mom has been defeated for the first time. These bosses, with the exception of Conquest and The Headless Horseman, are guaranteed to drop either a 15►Ball of Bandages Ball of Bandages or a 15►Cube of Meat Cube of Meat. By using the 15►Book of Revelations Book of Revelations on a floor, there is a much higher chance that the boss for the current floor will be a harbinger unless the floor has a fixed boss (for example, Mom in The Depths and Necropolis) or the harbinger has been fought already.


Famine is the Harbinger for Chapter 1.

Boss Famine.png


Pestilence is the Harbinger for Chapter 2.

Boss Pestilence.png


War is the Harbinger for Chapter 3. War cannot be found in Depths, Necropolis, or Added in Afterbirth Dank Depths II as Mom will always be the boss of that floor.

Boss War.png


Death is the Harbinger for Chapter 4. Death cannot be found in Womb, Utero, or Added in Afterbirth Scarred Womb II as Mom's Heart or It Lives will always be the boss of that floor.

Boss Death.png


Conquest is an alternative boss to Death in Chapter 4. He is unlocked once 10 items have been taken from Angel Rooms. Conquest does not drop normal Horseman items, instead dropping 15►White Pony White Pony.

Boss Conquest.png

The Headless Horseman[]

The Headless Horseman can appear in the place of any Harbinger. Like Conquest, he doesn't drop normal Horseman items, instead dropping 15►A Pony A Pony.

Boss The Headless Horseman.png

Unlockable Achievements[]


  • Conquest was added in the Binding of Isaac: Wrath of the Lamb. In the Bible, Conquest is actually the first Horseman to appear, while Pestilence is a Horseman existing only in popular culture, coming from a different translation of the Greek word 'Thanatos', often meaning Death instead (the canon four Horsemen, thus, are Conquest, War, Famine and Death).
    • Conquest's entry in the secrets is called "The Forgotten Horseman", because of that very reason.
  • Death is the only horseman specifically given a name in The Book of Revelation.
  • The use of the 15►Book of Revelations Book of Revelations item to summon a horseman for the current floor is reference to the fact that the book of the Bible in which the horsemen are described is Revelation.
  • None of the Harbingers have a death animation.
  • Under normal circumstances, Conquest and the Headless Horseman are 2 of only 5 bosses (the others being Krampus, The Fallen, and Baby Plum if spared) who drop or can drop active items upon defeat.
  • The horses used by the Harbingers resemble stick horses.

Bosses Boss Monstro.png
Chapter 1
Stage Basement icon.pngStage Cellar icon.pngStage Burning Basement icon.png
GeminiStevenBlighted OvumDingleThe Duke of FliesFamineGurglingsThe HauntLarry Jr.MonstroPinWidowThe FallenThe Headless Horseman
DangleLittle HornRag ManTurdlings
Baby Plum
Chapter 1.5
Stage Downpour icon.pngStage Dross icon.png
Lil BlubWormwoodThe RainmakerMin-MinClogColostomiaTurdlet
Chapter 2
Stage Caves icon.pngStage Catacombs icon.pngStage Flooded Caves icon.png
FistulaChubC.H.A.D.Carrion QueenDark OneGurdyGurdy Jr.The HollowThe HuskMega FattyMega MawPeepPestilencePolycephalusThe WretchedThe FallenThe Headless Horseman
The ForsakenThe FrailThe Stain
Big HornRag Mega
Chapter 2.5
Stage Mines icon.pngStage Ashpit icon.png
Reap CreepTuff TwinsHornfelGreat GideonSingeThe ShellThe Pile
Chapter 3
Stage Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
The AdversaryThe BloatThe CageThe GateMonstro IIGishLokiMask of InfamyWarThe FallenThe Headless HorsemanMom
Sisters Vis
Reap CreepThe Pile
Chapter 3.5
Stage Mausoleum icon.pngStage Gehenna icon.png
The SirenThe HereticThe VisageThe Horny BoysMomMom's Heart
Chapter 4
Stage Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
BlastocystThe BloatConquestDaddy Long LegsTriachnidDeathLokiiMama GurdyMr. FredScolexTeratomaThe FallenThe Headless HorsemanMom's HeartIt Lives
Sisters VisThe Matriarch
Stage Corpse icon.png
ChimeraThe ScourgeRotgutMother
Chapter 5
Stage Sheol icon.pngStage Cathedral icon.png
Chapter 6
Stage Dark Room icon.pngStage Chest icon.png
???The LambMega Satan
The Void
Stage The Void icon.png
Stage Home icon.png
DogmaThe BeastUltra DeathUltra FamineUltra PestilenceUltra War
Greed Mode
Ultra Greed
Ultra Greed
Ultra Greedier
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
Achievements Achievements Attributes Attributes Bosses Bosses TarotCard.png Cards and Runes Challenges Challenges Chapters Chapters
Characters Characters MainPageBabies.png Co-op Items Items Item pools Item pools Monsters Monsters Objects Objects
Pickups Pickups Pills Pills Rooms Rooms Seeds Seeds Transformations Transformations Trinkets Trinkets