Portal

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Portal
Afterbirth† Indicator.png
Portal.png
Base HP
9
Stage HP
5
Found In
Stage basement.pngStage cellar.pngStage burning basement.png
Stage caves.pngStage catacombs.pngStage flooded caves.png
Stage depths.pngStage necropolis.pngStage dank depths.png
Stage womb.pngStage utero.pngStage scarred womb.png
Stage sheol.pngStage cathedral.png

Portals are enigmatic entities which appear in many floors. They spawn 1-5 enemies then disappear, though they can be killed before they disappear.

For portals that spawn more than 3 enemies, the number of enemies spawned per portal is capped at 3 on the screen simultaneously; it would continue to spawn more once any of the 3 were killed. [1]

Portals spawn different enemies depending on the floor they appear on.

List of possible spawns[edit | edit source]

Chapter 1[edit | edit source]

Monsters Description
Dip
Dip
Slowly dashes in random directions, dealing contact damage.
Fatty
Fatty
Slowly walks towards Isaac. Occasionally farts, which pushes Isaac and adjacent enemies away.
Attack Fly
Attack Fly
Red fly that follows Isaac and deals touch damage.
Dart Fly
Dart Fly
DLC Indicator.png
Flies towards Isaac and attempts to mimic his movements. Deals contact damage.
Pooter
Pooter
Slow-moving fly that occasionally fires single blood shots at Isaac. Does not deal touch damage.
Gaper
Gaper
Walks towards Isaac, dealing contact damage. Usually turns into a Pacer or a Gusher upon death.
Frowning Gaper
Frowning Gaper
Walks towards Isaac, dealing contact damage. Upon getting near Isaac, it will open its eyes and pursue Isaac faster. Usually turns into a Pacer or a Gusher upon death.
Skinny
Skinny
Slowly walks towards Isaac, leaving short-lasting red creep behind itself.
Mulligan
Mulligan
Walks around the room, avoiding Isaac. Upon death, spawns several flies, which can be Black Flies, Attack Flies, or Pooters. Can suicide to explode and launch projectiles in the four ordinal directions while still releasing flies.
Pacer
Pacer
Walks aimlessly around the room.
Gusher
Gusher
Walks aimlessly around the room, occasionally firing short-ranged blood shots.
Round Worm
Round Worm
Pops out of the ground in random locations and spits a blood shot at Isaac if he is in sight.
Ministro
Ministro
Afterbirth† Indicator.png
Hops towards Isaac, occasionally spitting out a cluster of disorganized shots.

Chapter 2[edit | edit source]

Monsters Description
Bony
Bony
Wanders around the room and throws a bone at Isaac when he is in sight.
Dip
Dip
Slowly dashes in random directions, dealing contact damage.
Squirt
Squirt
Dashes towards the player and deals contact damage. Spawns 2 Dips upon death.
Fatty
Fatty
Slowly walks towards Isaac. Occasionally farts, which pushes Isaac and adjacent enemies away.
Pale Fatty
Pale Fatty
Slowly walks towards Isaac. Occasionally farts and shoots blood shots in 6 directions. Can turn into a Blubber upon death.
Half Sack
Half Sack
Wanders around aimlessly and leaves a trail of red creep.
Black Fly
Black Fly
Tiny black fly with neutral AI. Does not hurt Isaac upon touch.
Attack Fly
Attack Fly
Red fly that follows Isaac and deals touch damage.
Boom Fly
Boom Fly
Flies around the room diagonally, dealing touch damage and exploding upon death.
Red Boom Fly
Red Boom Fly
Flies around the room diagonally, dealing touch damage and exploding into 6 blood shots upon death.
Sucker
Sucker
Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
Skinny
Skinny
Slowly walks towards Isaac, leaving short-lasting red creep behind itself.
Hopper
Hopper
Slowly hops around the room, dealing touch damage. Can turn into a Flaming Hopper by jumping into fire.
Mobile Host
Mobile Host
Acts like the Host, but follows Isaac and deals contact damage.
Maw
Maw
Slowly floats towards Isaac, firing blood shots.
Red Maw
Red Maw
Floats towards Isaac and explodes into 4 blood shots in the cardinal directions upon death.
One Tooth
One Tooth
Follows Isaac and periodically dashes towards Isaac when it gets close. Deals contact damage.
Round Worm
Round Worm
Pops out of the ground in random locations and spits a blood shot at Isaac if he is in sight.
Ragling
Ragling
Quickly leaps towards Isaac and deals touch damage. Randomly shoots two purple shots that orbit around it.
Tumor
Tumor
Moves around the room diagonally, occasionally firing 6 shots. Fires more often upon getting damaged.
Fat Bat
Fat Bat
DLC Indicator.png
Slowly flies towards Isaac. Shoots when Isaac aligns diagonally with it and will actively try to avoid Isaac's shots.
Drowned Boom Fly
Drowned Boom Fly
DLC Indicator.png
Flies around the room diagonally, dealing touch damage. Upon death, explodes, fires four blood shots in the cardinal directions, and spawns a Drowned Charger.
Mushroom
Mushroom
Afterbirth† Indicator.png
Stationary enemy that occasionally pops up and fires four shots in the cardinal or diagonal directions. Takes less damage while its head is down.

Chapter 3[edit | edit source]

Monsters Description
Bony
Bony
Wanders around the room and throws a bone at Isaac when he is in sight.
Death's Head
Death's Head
Invulnerable enemy that moves diagonally around the room, dealing contact damage. Dies when the room is cleared.
Brain
Brain
Slowly crawls around the room, leaving a trail of red creep.
Dip
Dip
Slowly dashes in random directions, dealing contact damage.
Squirt
Squirt
Dashes towards the player and deals contact damage. Spawns 2 Dips upon death.
Pale Fatty
Pale Fatty
Slowly walks towards Isaac. Occasionally farts and shoots blood shots in 6 directions. Can turn into a Blubber upon death.
Fat Sack
Fat Sack
Slowly walks towards Isaac. Occasionally leaps off-screen and attempts to land on Isaac, leaving a puddle of creep and shooting blood shots in 6 directions where it lands. Can turn into a Blubber upon death.
Blubber
Blubber
Walks around aimlessly and randomly spews blood around itself. Can turn into a Half Sack when killed.
Half Sack
Half Sack
Wanders around aimlessly and leaves a trail of red creep.
Attack Fly
Attack Fly
Red fly that follows Isaac and deals touch damage.
Boom Fly
Boom Fly
Flies around the room diagonally, dealing touch damage and exploding upon death.
Red Boom Fly
Red Boom Fly
Flies around the room diagonally, dealing touch damage and exploding into 6 blood shots upon death.
Sucker
Sucker
Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
Globin
Globin
Chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
Gazing Globin
Gazing Globin
Quickly chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
Leech
Leech
Quickly charges towards Isaac when he gets in its line of sight.
Leaper
Leaper
Hops around the room, dealing touch damage. Occasionally jumps high into the air, dropping down onto Isaac's position while firing 4 blood shots in the cardinal directions.
Knight
Knight
Moves erratically around the room and charges toward Isaac when in line of sight. Can only be damaged from behind.
Maw
Maw
Slowly floats towards Isaac, firing blood shots.
Red Maw
Red Maw
Floats towards Isaac and explodes into 4 blood shots in the cardinal directions upon death.
One Tooth
One Tooth
Follows Isaac and periodically dashes towards Isaac when it gets close. Deals contact damage.
Ragling
Ragling
Quickly leaps towards Isaac and deals touch damage. Randomly shoots two purple shots that orbit around it.
Tumor
Tumor
Moves around the room diagonally, occasionally firing 6 shots. Fires more often upon getting damaged.
Lil' Haunt
Lil' Haunt
Follows Isaac erratically and occasionally shoots blood shots toward Isaac's destination, predicting his movements.
Black Bony
Black Bony
DLC Indicator.png
Wanders around the room and throws three bones in a row at Isaac when he is in sight. Explodes upon death.
Dank Death's Head
Dank Death's Head
DLC Indicator.png
Moves diagonally around the room, dealing contact damage. Needs to be killed to complete the room.
Fat Bat
Fat Bat
DLC Indicator.png
Slowly flies towards Isaac. Shoots when Isaac aligns diagonally with it and will actively try to avoid Isaac's shots.

Chapter 4[edit | edit source]

Monsters Description
Death's Head
Death's Head
Invulnerable enemy that moves diagonally around the room, dealing contact damage. Dies when the room is cleared.
Brain
Brain
Slowly crawls around the room, leaving a trail of red creep.
Pale Fatty
Pale Fatty
Slowly walks towards Isaac. Occasionally farts and shoots blood shots in 6 directions. Can turn into a Blubber upon death.
Black Fly
Black Fly
Tiny black fly with neutral AI. Does not hurt Isaac upon touch.
Attack Fly
Attack Fly
Red fly that follows Isaac and deals touch damage.
Sucker
Sucker
Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
Fred
Fred
Hops out of the ground and burrows elsewhere, firing 4 blood shots in the ordinal directions. Occasionally fires red Ipecac shots at Isaac.
Globin
Globin
Chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
Gazing Globin
Gazing Globin
Quickly chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
Flesh Mobile Host
Flesh Mobile Host
Acts like the Red Host, but follows Isaac and deals contact damage.
Mobile Host
Mobile Host
Acts like the Host, but follows Isaac and deals contact damage.
Leech
Leech
Quickly charges towards Isaac when he gets in its line of sight.
Lump
Lump
Fires 3 spread blood shots at Isaac when he gets in its line of sight. Will burrow underground and reappear elsewhere after firing.
Maw
Maw
Slowly floats towards Isaac, firing blood shots.
Mr. Maw
Mr. Maw
Walks towards Isaac and attacks by launching its head towards Isaac. Turns into a Maw or Pacer upon death depending on the killed body segment.
Swinger
Swinger
Slowly moves towards Isaac as its head swings around its base. Upon death, spawns a Maw or a Globin depending on which part is killed.
Para-Bite
Para-Bite
Moves towards Isaac, dealing contact damage. Can burrow underground and reappear elsewhere.
Tumor
Tumor
Moves around the room diagonally, occasionally firing 6 shots. Fires more often upon getting damaged.
Flesh Death's Head
Flesh Death's Head
DLC Indicator.png
Moves diagonally around the room, dealing contact damage. Explodes into 6 blood shots in all directions upon death. Can be killed, but also dies when the room is cleared.
Scarred Para-Bite
Scarred Para-Bite
DLC Indicator.png
Moves towards Isaac, dealing contact damage and firing short-range blood shots. Can burrow underground and reappear elsewhere.
Meatball
Meatball
DLC Indicator.png
Slides around the room, occasionally stopping to spew a fountain of short-range blood shots in all directions or to spit a line of damaging red creep. Spawns a Host upon death.

Chapter 5[edit | edit source]

Sheol[edit | edit source]

Monsters Description
Bony
Bony
Wanders around the room and throws a bone at Isaac when he is in sight.
Death's Head
Death's Head
Invulnerable enemy that moves diagonally around the room, dealing contact damage. Dies when the room is cleared.
Camillo Jr.
Camillo Jr.
Moves around the room diagonally, occasionally firing Technology lasers towards Isaac. Fires more often upon getting damaged.
Globin
Globin
Chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
Gazing Globin
Gazing Globin
Quickly chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
Black Globin
Black Globin
DLC Indicator.png
Chases Isaac, dealing a full heart of contact damage and spawning spiders. Upon taking enough damage, it separates into a head and body. The head slides towards Isaac, leaving a trail of damaging red creep. The body wanders around aimlessly, occasionally spawning spiders.
Mobile Host
Mobile Host
Acts like the Host, but follows Isaac and deals contact damage.
Selfless Knight
Selfless Knight
Moves erratically around the room and charges toward Isaac very quickly when in line of sight. Can only be damaged from behind.
Leech
Leech
Quickly charges towards Isaac when he gets in its line of sight.
Kamikaze Leech
Kamikaze Leech
Quickly charges towards Isaac when he gets in its line of sight. Explodes upon death.
Null
Null
Act like faster Frowning Gapers. When Isaac gets near, they phase in and out of visibility and pursue Isaac faster.
Sucker
Sucker
Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
Lil' Haunt
Lil' Haunt
Follows Isaac erratically and occasionally shoots blood shots toward Isaac's destination, predicting his movements.
Imp
Imp
DLC Indicator.png
Slowly drifts towards Isaac, frequently firing 5 blood shots in quick succession towards Isaac. Tries to avoid Isaac's shots and occasionally teleports and reappears elsewhere.
Bone Knight
Bone Knight
DLC Indicator.png
Moves erratically around the room, charges toward Isaac when in line of sight, and leaves behind a trail of damaging red creep. Can only be damaged from behind.

Cathedral[edit | edit source]

Monsters Description
Bony
Bony
Wanders around the room and throws a bone at Isaac when he is in sight.
Death's Head
Death's Head
Invulnerable enemy that moves diagonally around the room, dealing contact damage. Dies when the room is cleared.
Pale Fatty
Pale Fatty
Slowly walks towards Isaac. Occasionally farts and shoots blood shots in 6 directions. Can turn into a Blubber upon death.
Gazing Globin
Gazing Globin
Quickly chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
Hanger
Hanger
Floats around the room, firing 3 spread blood shots at Isaac. Upon damaging Isaac, Isaac drops 2 coins on the ground but loses 3. Spawns with an eternal fly circling around it.
Leech
Leech
Quickly charges towards Isaac when he gets in its line of sight.
Holy Leech
Holy Leech
Quickly charges towards Isaac when he gets in its line of sight. Explodes upon death. Spawns with an Eternal Fly circling it.
Ragling
Ragling
Quickly leaps towards Isaac and deals touch damage. Randomly shoots two purple shots that orbit around it.
Spit
Spit
Flies slowly towards Isaac, firing an Ipecac shot upon death.
Psy Tumor
Psy Tumor
Moves around the room diagonally, occasionally firing 6 homing shots. Fires more often upon getting damaged.
Psychic Maw
Psychic Maw
Slowly floats towards Isaac, firing homing shots. Spawns with an Eternal Fly orbiting around it.
Wizoob
Wizoob
Disappears, then appears near Isaac and spits a cluster of spectral tears at him.
Lil' Haunt
Lil' Haunt
Follows Isaac erratically and occasionally shoots blood shots toward Isaac's destination, predicting his movements.

Entrance Portal[edit | edit source]

A special version of the Portal (dubbed the "Entrance Portal" to avoid confusion) serves as the entrance to The Void. It is found in the Blue Womb, but can also be found after defeating Mom's Heart/It Lives (10% chance), Isaac/Satan (15% chance), ???/The Lamb (20% chance) or Mega Satan (50% chance). The Entrance Portal room in the Blue Womb gets darker the closer the player is to the portal.

Bug Bug!  PC The entrance portal to The Void may not allow Isaac to enter, and the screen darkening and distortion effects may not appear. Entering the portal very slowly may allow Isaac to enter.

Trivia[edit | edit source]

  • Prior to v185, portals continually spawned enemies until they were defeated.

Gallery[edit | edit source]

References[edit | edit source]


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