Sack of Pennies is an unlockable passive item.
It is a brown bag with the cent mark on its front.
Isaac is followed by a small bag that drops a coin upon completion of every two rooms. Usually a Penny, sometimes a Nickel, and rarely, even a Dime.
- Money = Power - Allows Isaac to increase damage much more quickly.
- Bum Friend - Picks up the penny, might drop pickups or rarely - trinkets. Nickels and Dimes are treated as picking up their value in pennies, each with a spawn chance.
- If Isaac already has Little Steve, Robo-Baby or Sister Maggy when picking up this item, it will bug out and turn into Brother Bobby until Isaac leaves the room.
- If Isaac already has the Sack of Pennies and picks up Little C.H.A.D., the Sack of Pennies will turn into Little C.H.A.D. but still have both effects.