Binding of Isaac: Rebirth Wiki
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(Added more info and cleared some misconceptions about champion size.)
(Made size increase based on percentages for consistency with the boss champion descriptions.)
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{{#ev:youtube| https://youtu.be/6uOy5eglmBY}}
 
{{#ev:youtube| https://youtu.be/6uOy5eglmBY}}
   
Some monsters can spawn as a '''Champion''' which deviates in coloration and generally has a 1.15x visual size multiplier compared to its common form. The champion's coloration denotes which peculiar behaviors and traits it will exhibit. Champions will generally drop a [[pickup]] (coinciding with the color of the champion) when killed on normal difficulty. However, in hard mode, the drop rate is reduced to 33%, while in [[Greed Mode]], champions won't drop pickups at all.
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Some monsters can spawn as a '''Champion''' which deviates in coloration and size. The champion's coloration/size denotes which peculiar behaviors and traits it will exhibit. Champions will generally drop a [[pickup]] (coinciding with the color of the champion) when killed on normal difficulty. However, in hard mode, the drop rate is reduced to 33%, while in [[Greed Mode]], champions won't drop pickups at all.
   
Most champions inflict full heart damage regardless of [[chapter]] and have double the health of a normal monster. Champions are generally regarded as more dangerous than common monsters.
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Most champions have a visual 15% size increase, inflict full heart damage regardless of [[chapter]], and have double the health of a normal monster. Champions are generally regarded as more dangerous than common monsters.
   
 
{{dlc|na+}} Champions always deal contact damage, regardless of what monster they are (e.g. a common Mulligan will not deal contact damage, but champion versions will).
 
{{dlc|na+}} Champions always deal contact damage, regardless of what monster they are (e.g. a common Mulligan will not deal contact damage, but champion versions will).
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| [[file:Gaper.png|65px]]<br>{{dlc|a}} Large
 
| [[file:Gaper.png|65px]]<br>{{dlc|a}} Large
| style="text-align: left" | Increased health, slightly decreased speed and decreased pitch of sound effects. Visually massive size increase, though collision remains the same. Deals two full hearts of damage.
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| style="text-align: left" | Increased health, slightly decreased speed and decreased pitch of sound effects. Visually 50% larger, though collision remains the same. Deals two full hearts of damage.
 
| [[One Makes You Larger]] pill at 1/5th of difficulty based drop rate; can change other pills in the current rotation.
 
| [[One Makes You Larger]] pill at 1/5th of difficulty based drop rate; can change other pills in the current rotation.
 
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Revision as of 03:18, 1 December 2020

Monsters refers to the many antagonistic creatures the player will encounter throughout the game.

Most monsters (with few exceptions) will damage Isaac by either touching him or shooting him with projectiles. Less frequently, monsters will spawn additional, lesser monsters, spread creep, or attempt to affect the player's movement. Along with the more common variety of monsters, champion versions can be found lurking about. These monsters are often like their common counterparts, but have a color tint or size change and drop basic pickups on death. There are also champion versions of most bosses.

There are 196 naturally spawning monsters in total. 40 of them were added in Afterbirth and 21 were added in Afterbirth † (13 were added in Booster Packs). Almost all of these naturally spawning entities are featured in the (in Afterbirth † and Repentance) Bestiary, with the exceptions being the Rag Man's Ragling and Suction Pitfall.

Monster List

Champions

Some monsters can spawn as a Champion which deviates in coloration and size. The champion's coloration/size denotes which peculiar behaviors and traits it will exhibit. Champions will generally drop a pickup (coinciding with the color of the champion) when killed on normal difficulty. However, in hard mode, the drop rate is reduced to 33%, while in Greed Mode, champions won't drop pickups at all.

Most champions have a visual 15% size increase, inflict full heart damage regardless of chapter, and have double the health of a normal monster. Champions are generally regarded as more dangerous than common monsters.

(in Rebirth and Afterbirth) Champions always deal contact damage, regardless of what monster they are (e.g. a common Mulligan will not deal contact damage, but champion versions will).

The identifying scheme for champion qualities is as follows:

ID Appearance Effect Drop
0 Champion Red
Vivid Red
×2.5 amount of HP. Heart
1 Champion Yellow
Dark Yellow
Increased movement speed. Little battery
2 Champion Green
Strong Lime Green
Leaves green creep as it walks. Pill
3 Champion Orange
Vivid Orange
Attacks cause you to drop coins (like Greed or a Hanger). The number of coins dropped range from 1-3, which take away 2-4 coins in total respectively. No coins are dropped if you don't have any. Coin
4 Champion Dark Blue
Vivid Blue
Decreased speed. 3 Blue Flies
5 Champion Dark Green
Dark Cyan
Explodes when killed. Bomb
6 Champion Solid White
White
Invincible until all other enemies are killed. Eternal Heart
7 Champion Gray
Dark Gray
2/3 health, decreased speed. Key
8 Champion Transparent White
Transparent White
Tears become spectral tears, and it can move past environmental obstacles (such as pits) that it otherwise couldn't when forced. Locked Chest
9 Champion Black
Black
Fades in and out of visibility, like a Null. Red Chest
10 Champion Pink
Pure Magenta
Periodically shoots short-ranged blood shots, similar to Gushers. Nothing
11 Champion Purple
Mostly Pure Violet
Pulls Isaac and his shots towards itself, like a Gaping Maw. Random trinket
12 Champion Dark Red
Dark Red
Collapses into a flesh pile upon death and regenerates if not finished off (like a Globin). Double Heart
13 Champion Light Blue
Very Light Blue
Releases blood shots in 8 directions when killed. 1/2 heart
14 Champion Camouflage
(except in Rebirth) Camouflage
The enemy blends into the background and briefly becomes visible when damaged. Rune
15 Champion Pulsing Green
(except in Rebirth) Pulsing Strong Lime Green
Splits into two copies of itself upon death. 2 normal versions of itself
16 Champion Pulsing Gray
(except in Rebirth) Pulsing Dark Gray
Repels Isaac's shots when it pulses. Nothing
17 Champion Light White
(except in Rebirth) Light White
Has 1-2 Eternal Flies circling it. Spawns another fly upon death. Attack Fly
18 Gaper
(except in Rebirth) Small
Decreased health, increased speed and pitch of sound effects. 50% smaller both visually and collision-wise, making them more difficult to hit. One Makes You Small pill at 1/5th of difficulty based drop rate; can change other pills in the current rotation.
19 Gaper
(except in Rebirth) Large
Increased health, slightly decreased speed and decreased pitch of sound effects. Visually 50% larger, though collision remains the same. Deals two full hearts of damage. One Makes You Larger pill at 1/5th of difficulty based drop rate; can change other pills in the current rotation.
20 Champion Pulsing Red
(in Afterbirth † and Repentance) Pulsing Vivid Red
All other enemies in the room regenerate health at the rate of 20 HP per second while this enemy is alive. Heart
21 Champion Pulsating
(in Afterbirth † and Repentance) Pulsating
Spawns an Attack Fly on hit. After each hit, there is a delay until the next hit results in another Attack Fly. A single Pulsating enemy can have up to 5 Attack Flies at once. 4-6 Blue Flies
22 Champion Crown
(in Afterbirth † and Repentance) Crown
Increased health. All enemies in the room that are not champions will turn yellow while the crowned enemy is alive. The affected enemies will drop batteries like yellow champions upon dying, but otherwise have no extra health, speed or damage 2-3 random pickups
23 Champion Skull
(in Afterbirth † and Repentance) Skull
Produces a Collectible The Necronomicon iconThe Necronomicon effect upon death. Deals two full hearts of damage. Collectible The Necronomicon iconThe Necronomicon effect

The chances for Champion monsters to appear are noted in the table below:

Modifiers Normal mode Hard mode (in Afterbirth † and Repentance)The VoidThe Void
Base chance 5% 20% 75%
Collectible Champion Belt iconChampion Belt 20% 35% 75%
Purple HeartPurple Heart 10% 40% 100%
Purple HeartPurple Heart + (except in Rebirth)Collectible Mom's Box iconMom's Box 20% 80% 100%
Collectible Champion Belt iconChampion Belt + Purple HeartPurple Heart 40% 70% 100%
Collectible Champion Belt iconChampion Belt + Purple HeartPurple Heart + (except in Rebirth)Collectible Mom's Box iconMom's Box 80% 100% 100%
  • Collectible Champion Belt iconChampion Belt adds 15% to the base champion chance. This has no effect in (in Afterbirth † and Repentance)The VoidThe Void.
  • Purple HeartPurple Heart doubles the champion chance, and stacks with Champion's Belt.
    • (except in Rebirth)Collectible Mom's Box iconMom's Box changes Purple Heart to quadruple the chances instead of doubling.

Monster Replacements

Some monsters have a chance to be replaced with other monsters when they spawn, (in Afterbirth † and Repentance) but only at room entry. (except in Rebirth) Some replacements only occur on certain floors.

(Disclaimer: Chances are approximate!)

Base Monster Replacement Chance Notes
Rebirth
Mulligan Mulligoon 10%
Mulligan Mulliboom 1%
Mulligoon
Hopper Trite 6%
Stone Grimace Vomit Grimace 6%
Dople Evil Twin 5%
Eye Bloodshot Eye 5%
Leech Kamikaze Leech 5%
Leech Holy Leech 1%
Kamikaze Leech
Maw Red Maw 10%
Maw Psychic Maw 1%
Red Maw
Host Red Host 10%
Vis Double Vis 6%
Vis Chubber 1%
Double Vis
Boom Fly Red Boom Fly 10%
Pooter Fat Fly 10%
Knight Selfless Knight 5%
Clotty I.Blob 1%
Clot
MemBrain Mama Guts 6%
Globin Gazing Globin 10%
Baby Angelic Baby 6%
Boil Gut 6%
Boil Sack 1%
Gut
Walking Boil Walking Gut 6%
Walking Boil Walking Sack 1%
Walking Gut
Sucker Spit 6%
Poky Slide 6%
(except in Rebirth) Afterbirth
Frowning Gaper Flaming Gaper 60% Exclusive to (except in Rebirth)Burning BasementBurning Basement
Gaper
Fatty Flaming Fatty 60% Exclusive to (except in Rebirth)Burning BasementBurning Basement
Only a single Burning Basement room contains a Pale Fatty, making it a very unusual replacement to witness.
Pale Fatty
Hopper Flaming Hopper 60% Exclusive to (except in Rebirth)Burning BasementBurning Basement
Trite
Hive Drowned Hive 50% Exclusive to (except in Rebirth)Flooded CavesFlooded Caves
Maggot Drowned Charger 50% Exclusive to (except in Rebirth)Flooded CavesFlooded Caves
Charger
Spitty
Boom Fly Drowned Boom Fly 50% Exclusive to (except in Rebirth)Flooded CavesFlooded Caves
Red Boom Fly
Squirt Dank Squirt 50% Exclusive to (except in Rebirth)Dank DepthsDank Depths
Death's Head Dank Death's Head 50% Exclusive to (except in Rebirth)Dank DepthsDank Depths
Globin Dank Globin 50% Exclusive to (except in Rebirth)Dank DepthsDank Depths
Gazing Globin
Guts Scarred Guts 50% Exclusive to (except in Rebirth)Scarred WombScarred Womb
Para-Bite Scarred Para-Bite 50% Exclusive to (except in Rebirth)Scarred WombScarred Womb
Vis Scarred Double Vis 50% Exclusive to (except in Rebirth)Scarred WombScarred Womb
Double Vis
(in Afterbirth † and Repentance) Afterbirth+
Keeper Blister 10%
Ticking Spider 20%
Host Mushroom (Enemy) 20%
Red Host
Hopper Ministro 20%
Trite
Nerve Ending Nerve Ending 2 20%
Brain Poison Mind 20%
Pale Fatty Stoney 10%
Wall Creep The Thing 20%
Blind Creep
Rage Creep
Mr Maw Mr. Red Maw 20%
Skinny Crispy 40% Exclusive to (except in Rebirth)Burning BasementBurning Basement
Rottys do not appear in any Burning Basement room layouts, but can still be replaced regardless.
Rotty
Dank Charger Drowned Charger 50% Exclusive to (except in Rebirth)Flooded CavesFlooded Caves
Dank Chargers do not appear in any Flooded Caves room layouts, but can still be replaced regardless.
Stoney Cross Stoney 20% Exclusive to Aprils Fool challenge