Binding of Isaac: Rebirth Wiki

Flat Penny is a trinket.

Effect[]

  • Gives a chance of spawning a Key upon collecting any coin.
    • (except in Repentance) 50% chance.
    • (in Repentance) 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%

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 Keys generator.

Notes[]

In-game Footage[]

References[]

  1. The chance is calculated as 1-0.75(coin_worth)