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Rotten Penny trinket
Rotten Penny is an unlockable trinket in The Binding of Isaac, added in the Afterbirth+ DLC.
Description
Spawns a Blue Fly every time a coin is picked up.
Note
This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this trinket for the previous Repentance version, check this page instead.
How to unlock?
Have 20 Blue Flies at the same time.
Item pools
Rotten Penny can be found in the following item pools:
| Name | Weight |
|---|
Special synergies
The following special synergies and interactions for Rotten Penny have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Trinket multipliers | +1 Blue Fly per multiplier. |
* Note that not all possible synergies and interactions are listed here.
Internal item description
Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.
Rotten Penny
• Spawns a blue fly when picking up coins
• Golden Trinket (without Mom's Box): Spawns 2 blue flies when picking up coins
• Mom's Box: Spawns 2 blue flies when picking up coins
• Mom's Box + Golden Trinket: Spawns 3 blue flies when picking up coins
External links
- Check out the trinket description on the external Isaac Wiki.
Filigree Feather 
Door Stop 
Extension Cord 
Baby-Bender 
Finger Bone 
Jawbreaker