Flat Penny
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Flat Penny is a trinket.
Effect
- Gives a chance of spawning a
Key upon collecting any coin.
50% chance.
The chance is based on the coin's worth:[1]
| Coin | Chance |
|---|---|
 Penny
|
25.00% |
 Double Penny
|
43.75% |
 Nickel
|
76.27% |
 Dime
|
94.37% |
Notes
This trinket can be found by destroying 
Special Shopkeepers.
Synergies
Humbleing Bundle: All Keys spawned by the trinket get a 50% chance to turn into 
Key Rings.-
Tainted Keeper: The trinket works with the temporary coins spawned from defeating enemies, effectively turning it into an infinite Key generator. 
Golden Trinket / 
Mom's Box: Increases the chances to:[2]
| Coin | Chance |
|---|---|
| Penny
|
50.00% |
| Double Penny
|
75.00% |
| Nickel
|
96.88% |
| Dime
|
99.90% |
- Golden Trinket + Mom's Box: Increases the chances to:[3]
| Coin | Chance |
|---|---|
| Penny
|
75.00% |
| Double Penny
|
93.75% |
| Nickel
|
99.90% |
| Dime
|
99.99% |
