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The Quarry - The Loop
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| Pickups |
| Hearts | Coins | Bombs | Keys | Batteries | Pills | Cards/Runes | Chests |  Sacks
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Keys are used to gain entry to many of the game's rooms, as well as open 
Locked Chests and Key Blocks.
| Key | ID | Image | Worth | Additional Info | Unlock Method |
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| Key | 5.30.1 | 
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1 |  Humbling Bundle and   Equality! can replace this with a Key Ring.
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| Key Ring | 5.30.3 | 
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2 |  Doesn't spawn naturally. Can only be found by using certain items or encountering certain rooms.
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| Golden Key | 5.30.2 | 
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0 | Will not add to the player's key count, but when picked up, it will allow the player to use keys on anything that requires them without subtracting from their total for the duration of the current floor, even if the current number of keys is 0. There is a 1/50 chance for any given key pickup to be a golden key.  Sharp Key ignores the Golden Key and still subtracts keys from the key count upon use.
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| Charged Key
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5.30.4 | 
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1 | Acts as a  Lil' Battery when picked up. Key Bum will pick this up, but will not give Isaac any active charge. Key Bum will drop a Lil' Battery when picking the key up.
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 Complete Pokey Mans (challenge #33)
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Gallery[]
Rebirth concepts, including the Key Ring.
Unused pre-release sprite for the Key Ring found among the Room Editor files.
Trivia[]
Booster Pack #5 added an electrical graphical effect to Charged Keys.
- Charged Keys start sparkling as soon as they spawn, helping players distinguish them from normal keys and prevent wasting charges.
Bugs[]
 Bug!
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 Charged Keys do not increment Key Bum's key count when picked up.
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