Bursting Sack is a passive item added in The Binding of Isaac: Afterbirth.
Effect[]
- Certain spider enemies no longer target or deal contact damage to Isaac, nor actively spawn other enemies. Spiders that are spawned from enemies that are not affected by Bursting Sack will also remain neutral.
- Affected spider enemies that deal no damage to Isaac whatsoever include: Spider, Big Spider, Swarm Spider, Strider, Rock Spider, Tinted Rock Spider, Level 2 Spider,
Trite, Baby Long Legs, Small Baby Long Legs, Crazy Long Legs and Small Crazy Long Legs.
- Spiders and Big Spiders don't blink red when Isaac has the item.
- Swarm Spiders don't blink yellow when Isaac has the item.
- Trites will still uselessly try to target Isaac.
- Affected enemies that deal no contact damage but can still damage Isaac through other methods include: Ragling, Rag Man's Ragling, Blister, Ticking Spider, Migraine, Wall Creep, Blind Creep, Rage Creep, The Thing, Soy Creep, and Tainted Soy Creep.
- Except for Ticking Spiders, Migraines, and Blind Creeps, all other spiders will still uselessly try to target Isaac for contact damage.
- Coal Spiders aren't aggressive to Isaac, but will still deal contact damage.
- Unaffected spider enemies include Trite, Ragling, Rag Man's Ragling, Blister, Wall Creep, Blind Creep, Rage Creep, and The Thing.
- Twitchy is the only "spider" enemy that is still aggressive towards and will still damage Isaac, as they're classified as a Gaper rather than a spider.
- Affected spider enemies that deal no damage to Isaac whatsoever include: Spider, Big Spider, Swarm Spider, Strider, Rock Spider, Tinted Rock Spider, Level 2 Spider,
Unaffected spider enemies include Trite, Ragling, Rag Man's Ragling, Blister, Wall Creep, Blind Creep, Rage Creep, and The Thing.- This item belongs to the Spider Baby set. Collecting three items from this set will transform Isaac into a humanoid spider.
Notes[]
- If either character holds Bursting Sack when playing as Jacob and Esau, neither will be hurt by the affected spiders.
In-game Footage[]
Trivia[]
- This item is similar to Skatole, only affecting spiders instead of flies.
- Befitting the name, this item's appearance is similar to a bursting Sack.
Seeds[]
PC 
Z0MB 7AMP (First floor Treasure Room)
Switch 2MFE VQC9 (Treasure Room next to spawn)
PC 
J7FV DTGC (First Floor Treasure Room)
Bugs[]
 Bug!
|
Spider enemies that are neutralized by Bursting Sack cannot be poisoned by contact via  The Virus,  Serpent's Kiss, or turned into gold via  Midas' Touch. They also become immune to contact damage from  My Little Unicorn,  The Gamekid, and  The Nail, but not the damage from Midas' Touch or  Little Horn.
|
|---|
 The Binding of Isaac: Rebirth
| |||||
|---|---|---|---|---|---|
 Achievements
|
 Attributes
|
 Bosses
|
 Cards and Runes
|
 Challenges
|
 Chapters
|
 Characters
|
 Co-op
|
 Items
|
 Item pools
|
 Monsters
|
 Objects
|
 Pickups
|
 Pills
|
 Rooms
|
 Seeds
|
 Transformations
|
 Trinkets
|
