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Portal

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The gate is open! Defeat The Lamb for the 1st timeThe gate is open!The gate is open!
Added in Afterbirth †

Portals are enigmatic entities which appear in many floors. They continuously spawn enemies until they are destroyed or spawn a certain number of enemies.

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.
Spider
Spider
Erratically moves towards Isaac and deals touch damage.
Pooter
Pooter
Slow-moving fly that occasionally fires single blood shots at Isaac. Does not deal touch damage.
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.
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.
Round Worm
Round Worm
Pops out of the ground in random locations and spits a blood shot at Isaac if he is in sight.
Hopper
Hopper
Slowly hops around the room, dealing touch damage. Can turn into a Flaming Hopper by jumping into fire.

Chapter 2[edit | edit source]

Monsters Description
Pale Fatty
Pale Fatty
Slowly walks towards Isaac. Occasionally farts and shoots blood shots in 6 directions. Can turn into a Blubber upon death.
Boom Fly
Boom Fly
Flies around the room diagonally, dealing touch damage and exploding upon death.
Sucker
Sucker
Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
Maw
Maw
Slowly floats towards Isaac, firing blood shots when Isaac is in range of them.
One Tooth
One Tooth
Follows Isaac and periodically dashes towards Isaac when it gets close. Deals contact damage.
Fat Bat
Fat Bat
Added in Afterbirth
Slowly flies towards Isaac. Shoots when Isaac aligns diagonally with it and will actively try to avoid Isaac's shots.
Charger
Charger
Slowly moves around the room, charging at Isaac when he gets in its line of sight.

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.
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.
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.
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.
Tumor
Tumor
Moves around the room diagonally, occasionally firing 6 shots. Fires more often upon getting damaged.
Baby
Baby
Slowly floats towards Isaac and fires blood shots. Occasionally teleports and reappears elsewhere.

Chapter 4[edit | edit source]

Monsters Description
Brain
Brain
Slowly crawls around the room, leaving a trail of red creep.
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.
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.
Para-Bite
Para-Bite
Moves towards Isaac, dealing contact damage. Can burrow underground and reappear elsewhere.
Clotty
Clotty
Randomly wanders around the room, firing 4 blood shots in the cardinal directions.

Chapter 5[edit | edit source]

Cathedral / Sheol[edit | edit source]

Monsters Description
Bony
Bony
Wanders around the room and throws a bone at Isaac when he is in sight.
Baby
Baby
Slowly floats towards Isaac and fires blood shots. Occasionally teleports and reappears elsewhere.
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.
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, which instantly dies when the Holy Leech explodes.
Keeper
Keeper
Hops around the room, firing 2 blood shots in a V formation at Isaac. Upon damaging Isaac, Isaac drops 2 coins on the ground but loses 3.
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.

Unlockable achievements[edit | edit source]

Notes[edit | edit source]

  • Charming a Portal with Mom's Eyeshadow Mom's EyeshadowMom's Eyeshadow Icon.pngTears have a chance to charm enemies. or similar items will cause the Portal to spawn permanently charmed enemies similar to the Friendly Ball.
    • As a result, a permanently charmed Death's Head can spawn from charmed Portals on Chapter 3 and remain permanently invulnerable. This is the only known method of charming an invulnerable enemy.
  • If a portal is spawned in either The Chest or the Dark Room via Added in Afterbirth † Debug Console, the Portal will despawn a few seconds before spawning any monster.
  • If Portals aren't unlocked, certain enemies will spawn in their rooms instead, depending on the floor the room is in. For instance, Frowning Gapers spawn as Portal placeholders on Chapter 1 floors, whereas Vises spawn as Portal placeholders on Chapter 4 floors.

Trivia[edit | edit source]

  • Prior to v185, portals continually spawned enemies until they were defeated.
  • Portals were able to spawn Bosses such as the Haunt on floors such as the Cathedral. This was later removed.
  • As of Booster Pack #5, Portals will now leave a purple "blood" splatter when killed by the player. This effect is only for aesthetic purposes.

Gallery[edit | edit source]

References[edit | edit source]



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