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Humbling Bundle is an item added to The Binding of Isaac: Rebirth. It is a piece of old paper with the "1+1=!" text.
Isaac seems to start smiling.
Note: Half red hearts are not paired
- The item is a reference to the Humble Bundles, collections of games and soundtracks that are sold online through a "pay what you want" system. The original game was represented in three humble bundles.