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Isaac (boss)

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Xxx form2Isaac Rebirth

This article refers Isaac as a boss. For the character, see Isaac.
For other uses, see Isaac (disambiguation).
Isaac

Bc isaac

Boss Isaac (Boss)


Official artwork by Edmund McMillen.
Statistics
Type
Health
Damage
Boss
2000
Floor(s)
Cathedral
Related Bosse(s)
???
Effective Item(s)
Powerful but slow-firing items, such as Polyphemus or Dr. Fetus
Dropped Item(s)
N/A

Isaac is a boss added with the Wrath of the Lamb DLC for the original game, and also appear in the Rebirth. He is the game's main character as the final, fixed boss of The Cathedral.

Behavior

Phase 1

Isaac form1

1st phase.

Isaac will appear lying down in the center of the room, crying on the floor. He shoots 12 high-velocity tears in a radial burst and will retaliate with streams of tears when hit.

Phase 2

Isaac form2

2nd phase.

At 66% of his health, a light will shine on Isaac, and he jumps from the ground. Isaac will then start shooting 4 large purple tears, which home slightly, in all directions. He will still retaliate with some tears when hit.

Phase 3

Isaac form3

3rd phase.

Triggered near 33% of Isaac's health. Isaac will grow angel wings, smile, and start floating. White beams will be randomly shot down from the sky (Similar to Crack The Sky and White Pony), Angel Babies will start spawning frequently (up to a maximum of 6), and the same homing projectiles from before will be shot in six directions at the same time. At this point, Isaac will no longer retaliate with tears when hit.

Notes

  • Using The Bible during or after the fight will instantly kill the player (Similar to ??? and Satan) unless they have The Wafer item, which will deal 1/2 heart damage instead.
  • Using items with a high fire rate (such as Technology 2) is dangerous in this fight, as Isaac will retaliate with a very large amount of tears upon being hit, unless the player have Mom's Contacts. This also applies to effects which apply damage rapidly, such as Mom's Knife.
  • Applying slow effects such as Little Gish or Spider Bite to Isaac will not affect the speed of his homing tears, but will slow all normal tears.
  • Activating Mom's Bra or triggering the special effect of Mom's Contacts will prevent Isaac from spawning enemies or attacking at all—including when damaged—for the duration of the effect.
  • Isaac cannot be damaged by the Crack The Sky light beams, or by his own. However, any Angelic Babies in the fight can take a small amount of damage from his light beams.
  • It is possible to reduce Isaac to 0 health. If Isaac is on 0 hp, the wings and light will disappear, and Isaac will resume crying on the floor. No projectiles/beams of light will be used (just like when ??? (boss) is reduced to 0 hp). However, any angels spawned from the previous phase will still survive, and will continue to attack the player.

Trivia

  • The third form is referenced in the Wrath of the Lamb DLC's trailer, which showed Isaac sprouting wings.
  • From both the original game and Rebirth, in phase 1, Isaac makes the same weeping noises as the Mulligan.
  • When Isaac was first added in the initial release of Wrath of the Lamb, his third form only consisted of the rays of light, except with a tremendous rate of firing.
  • From the original game, the picture of Isaac on Isaac's Last Will is identical to that of the Mulligan, but without the bloated head.

Bugs

  • If the player uses The Hourglass, Isaac will fire blood tears instead of the usual blue tears and purple homing tears.
  • From the original game, if the player is killed by the light beams in the final stage of the battle, the Last Will will display a picture of War.

Videos


Bosses
Regular Bosses
Blastocyst button

Blastocyst
Brownie
Chub button

Chub
Daddy Long Legs button

Daddy Long Legs
Dangle
Dark One button

Dark One
Dingle button

Dingle
Duke of Flies button

The Duke of Flies
Fallen button

The Fallen
Fistula button

Fistula
Gemini button

Gemini
Gurdy button

Gurdy
Gurdy Jr button

Gurdy Jr.
Gurgling button

Gurglings
Haunt button

The Haunt
Larry Jr button

Larry Jr.
Little Horn
Loki button

Loki
Mama Gurdy button

Mama Gurdy
Mask of Infamy button

Mask of Infamy
Mega Fatty button

Mega Fatty
Mega Maw button

Mega Maw
Monstro button

Monstro
Mr Fred button

Mr. Fred
Peep button

Peep
Pin button

Pin
Polycephalus button

Polycephalus
Rag Man
Scolex button

Scolex
Turdlings
Widow button

Widow
Posthumous Bosses
Adversary button

The Adversary
Blighted Ovum button

The Blighted Ovum
Bloat button

The Bloat
Cage button

The Cage
Carrion Queen button

Carrion Queen
The Forsaken
The Frail
Gate button

The Gate
Hollow button

The Hollow
Husk button

The Husk
Lokii button

Lokii
Monstro II button

Monstro II
Teratoma button

Teratoma
The Stain
Wretched button

The Wretched
Alternative Bosses
CHAD button

C.H.A.D.
Gish button

Gish
Sister Vis button

Sisters Vis
Steven button

Steven
Triachnid button

Triachnid
Harbingers
Conquest button

Conquest
Death button

Death
Famine button

Famine
Headless Horseman button

Headless Horseman
Pestilence button

Pestilence
War button

War
Final Bosses
XXX button

???
Hush
Isaac button

Isaac
It Lives button

It Lives
Lamb button

The Lamb
Mega Satan button

Mega Satan
Mom button

Mom
Mom's Heart button

Mom's Heart
Satan button

Satan
Ultra Greed
Minibosses
Seven Deadly Sins
Envy button

Envy
Gluttony button

Gluttony
Greed button

Greed
Lust button

Lust
Pride button

Pride
Sloth button

Sloth
Wrath button

Wrath
Seven Super Deadly Sins
Envy button

Super Envy
Super Gluttony button

Super Gluttony
Super Greed button

Super Greed
Super Lust button

Super Lust
Super Pride button

Super Pride
Super Sloth button

Super Sloth
Super Wrath button

Super Wrath
Ultra Pride button

Ultra Pride
Angels / Demons
Krampus button

Krampus
Angel button

Gabriel
Angel button

Uriel
Angel button

Fallen Angels
LEGENDS: The Binding of Isaac bosses are yellow. Wrath of the Lamb bosses are teal. Rebirth bosses are orange. Afterbirth bosses are crimson. Afterbirth † bosses are violet.

Start a Discussion Discussions about Isaac (boss)

  • OMG!

    5 messages
    • 166.137.14.53 wrote:Versed isn't a verb, "it's" suggests present tense while "was" is past tense, the second and third "it's" should be "its", ...
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  • That's my (sad) history

    15 messages
    • dead cat is pretty inconvenient, as somebody who plays azazel the bob's brain item is a game-ender, though
    • Bobs brain Is maybe a game ender But it Is when you play the lost I call bobs brain a kamikaze Item Also on my list Are BBF and Fire mind

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