Cellar

The Cellar is a chapter added in the Wrath of the Lamb DLC. Its appearance is similar to the Basement, but it has cobwebs on the walls and the floor is made of rotting wood. In rebirth you have to unlock it by killing each boss in the Basement including the smaller twin first during gemini fight its not necessary to fight steven

396px-Wrath of lamb — A beta screenshot of the Cellar.

Many rooms in Cellar have spider webs in them which slow down things that pass through it. These spider webs can be destroyed by explosions.

The monsters "indigenous" to this floor are Spiders.

Rooms[]

1: The room will always appear once in this floor
2: The room will always appear twice in this floor
Possible: There is a chance for this room to appear, usually due to certain criteria being met
*: This room can only appear due to a bug or special item
-: The room cannot appear in this floor.

Rooms	Cellar 1	Cellar 2	Cellar XL	Note
Rooms with the core game
Regular Rooms	10-12	14-15	21-25
Treasure Room	1	1	2	Both Treasure Rooms are locked in The Cellar XL.
Shop	1	1	1	There is always one shop, even in XL floors.
Secret Room	1	1	1
Boss Room	1	1	2	Boss Rooms are always linked in XL floors.
Challenge Room	-	Possible	Possible	Will only be generated if Isaac has full health while entering the floor. Cannot appear in The Cellar 1.
Arcade	-	Possible	-	Only generated when Isaac has 5 Coins upon entering a new floor or part.
Devil Room	*	Possible	Possible	Only reachable by The Joker card.
I AM ERROR	Possible	Possible	Possible	Only reachable by using the Telepills, which have a 6.66% chance to teleport Isaac to this room.
Rooms with Wrath of the Lamb
Rooms	Cellar 1	Cellar 2	Cellar XL	Note
Super Secret Room	1	1	1
Curse Room	Possible	Possible	Possible
Sacrifice Room	Possible	Possible	Possible
Angel Room	*	Possible	Possible	Only reachable by The Joker card.
Library	Possible	Possible	Possible	5% base chance to spawn, 25% if Isaac is holding a book.
Boss Challenge Room	*	Possible	Possible	Can spawn on The Cellar 1, probably due to a bug.

Monsters[]

Monster	Description	WotL DLC
Spit	Flies slowly towards Isaac, exploding into an IPECAC shot upon death which targets other Spits in the room, or Isaac.	✔
Spider	Moves erratically around the room, damaging Isaac by touch.	✔
Big Spider	Moves erratically around the room, splitting into two Spiders upon death.	✔
Trite	Quickly jumps towards Isaac with high distance.	✔
Sack	Stationary enemy that shrinks upon being hit. Swells up slower than Guts and Boils. Spawns a Spider when fully swollen.	✔
Mulligoon	Harmless enemy that walks around the room, avoiding Isaac. Will drop a Troll Bomb upon death.
Mulliboom	Walks towards Isaac, exploding with a large blast radius upon death or upon touching Isaac. The explosion does a half-heart of damage instead of the regular full heart.	✔
Gusher	Walks aimlessly around the room, firing extremely short-ranged blood projectiles from its head. Usually spawned after killing a Gaper/Frowning Gaper.
Gaper	Walks towards Isaac, dealing contact damage. Usually turns into a Pacer or Gusher upon death.
Frowning Gaper	Walks towards Isaac, dealing contact damage. Usually turns into a Pacer or Gusher upon death.
Horf	Stationary enemy that fires medium ranged blood shots at Isaac.
Clotty	Moves around the room, firing 4 blood shots in a plus pattern.
Clot	Moves around the room, firing 4 tar shots in an X pattern.
Bosses found in normal rooms:
Embryo	Aimlessly hops around the room, damaging Isaac by contact damage.

Bosses[]

Trivia[]

When Wrath of the Lamb was first announced, many thought that the alternate floor would be called the Attic instead of the Cellar.
The music in The Cellar was used in the demo.

Room Layouts[]

Chapters

Chapter 1	Chapter 2	Chapter 3	Chapter 4	Chapter 5	Chapter 6
The Basement The Cellar	The Caves The Catacombs	The Depths Necropolis	The Womb Utero	Sheol Cathedral	The Chest