Curious Heart is an active item in Repentance Negative, a mod for The Binding of Isaac.

Spawns a random heart or nothing at all:
• 25% → nothing.
• 20% → Half Heart
• 15% → Soul Heart
• 15% → Black Heart
• 10% → Heart
• 10% → Eternal Heart
• 5% → Double Heart

Curious Heart can be found in the following item pools:

• Download Repentance Negative from the Steam Workshop.