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Chaos is a passive item added in Afterbirth.
- Drops 1-6 random pickups around Isaac.
- Causes items to be chosen from random Item Pools.
- As the item does not actually mix or combine item pools, it is possible to quickly deplete smaller item pools and end up with Breakfast.
- Thus, if Chaos tries to pull from an item pool that is already depleted, it will not pull from a different pool and instead give you Breakfast.
- As many Greed Mode item pools are small, Chaos tends to result in Breakfast more often during Greed Mode.
- Since all item pools have the same probability of being selected, bomb-related items are much more common due to the Bomb Bum item pool.
- The item's sprite is a Symbol of Chaos.
- The character appearance is similar to the "Trollface".
- The Forgotten has their own unique appearance from Chaos. Rather than the troll face grin, The Forgotten's grin is larger, fully showing his teeth (likely due to being skeletal), and the smile is even across both sides of his face.