Humbling Bundle

Effects

(Removed in Repentance) Transforms all (Bomb) Bombs, (Key) Keys, (Penny) Pennies, and (Red Heart) Red Hearts into their respective Double versions.
- (Added in Repentance) Provides a 50% chance to transform the aforementioned pickups into their respective Double versions.

Only works specifically on (Bomb) Bombs, (Key) Keys, (Penny) Pennies, and (Red Heart) Red Hearts; other variants, like (Nickel) Nickels or (Soul Heart) Soul Hearts, etc., are not doubled.
(Removed in Repentance) By bombing (Donation Machine.png) Donation Machines, Isaac can earn more money than is taken from the machine, giving an endless supply of coins until the machine breaks or he runs out of bombs.
When used while fighting (Greed) Greed, (Hanger) Hangers, or (Keeper) Keepers, every coin knocked out of Isaac will be worth two coins, allowing Isaac to net a profit.

Contract From Below: Single pickup drops have a 2/3 chance to be doubled, which then become their doubled versions by Humbling Bundle. This essentially results in an average increase from 1.33x more pickups to 2.67x more.
- (Added in Repentance) The average gain is reduced to 2x more pickups instead.
(Removed in Repentance) The Jar: Allows for replicating hearts. Using the jar with 4 hearts inside it will cause 8 to drop, allowing Isaac to create an infinite amount of Red Hearts.
Maggy's Bow: Allows all normal heart pickups to be worth four hearts. However it's bugged sometimes[Check ingame].