Circle of Protection is a passive item added in The Binding of Isaac: Afterbirth.
Effects[ | ]
- Surrounds Isaac with a large white halo.
- Once per second, the halo deals Isaac's Damage to all enemies currently inside it.
- Each enemy shot has a 30% chance to be reflected by the halo.
- The chance is predetermined, and not affected by how long it is exposed by the halo.
- The reflectable tears are reflected once they touch the middle line of the halo, and is converted into friendly purple homing tears that have Isaac's Damage and no other tear modifiers.
Projectiles that create other projectiles (e.g. Shady) do not create the projectiles once reflected.- Can reflect:
- Explosive projectiles (e.g. from Gurgle), which do not explode once reflected.
- Fireballs (e.g. from Crackle), which do not create lines of fire once reflected.
- Fire projectiles (e.g. from Mega Satan).
- Obstacles thrown by Polty or Kineti.
- Explosive projectiles (e.g. from
- Does not reflect:
Projectiles that create other projectiles (e.g. 
Interactions[ | ]
- Circle of Protection: Multiple copies of this item through sources such as Diplopia or Crooked Penny has no effect.
In-game Footage[ | ]
Trivia[ | ]
- Circle of Protection is based on a cycle of Magic: the Gathering cards of the same name, which similarly provide defensive effects to their wielder.
- Circle of Protection's in-game icon may be based on the band A Perfect Circle's logo. The pickup quote is also similar to the lyrics of their song Pet.
 The Binding of Isaac: Rebirth
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