The user of an enchanted heart can:

• Crush it and kill the victim
• Control the victim's actions and speech
• Use the heart to reanimate the victim's dead bodies
• Split it in half to save a crushed victim of true love
• Remove the darkness from within the victim's heart using the Sorcerer's Hat to absorb the darkness

Additionally, people with their hearts ripped out are unable to feel any true emotion until the heart is restored. If someone commits an evil act of darkness like murder, the heart will begin to blacken; and if this heart becomes completely black, the person will die.