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| Defeat Delirium as AzazelDark Prince's Crown|
Dark Prince's Crown is an unlockable passive item added in Afterbirth †.
- When at exactly 1 red heart, some of Isaac's stats are increased.
- +1.50 range
- +0.7 tears
- +0.20 shot speed
- The effect is lost any time Isaac gains or loses red hearts.
- This item would especially go well with Eve, since she starts with Whore of BabylonIncreases damage and speed whenever Isaac has half a red heart or less (one red heart for Eve), ignoring any soul or black hearts., and is the only character that can gain Whore of Babylon's effect at 1 heart.
- This item has no effect on Blue Baby, The Lost, or The Soul since they cannot gain red hearts.
- This item only affects Keeper when he has only one coin heart.
- This item only affects The Forgotten when he has one full bone heart.
- The effect does not stack with multiple Dark Prince's Crowns.
- This is the demonic counterpart of the Crown of LightGives Isaac a crown that glows blue when active, and turns gray when inactive. While Isaac has no empty red heart containers, Isaac's tears are replaced with blue diamond tears that deal double damage. Regardless of health, the crown will deactivate for the current room when Isaac takes damage..