Rarer than any metal, any mineral, so rare that if you scan the entire earth, all six million billion billion kilos or 13,000,000,000,000,000,000,000,000 pounds of our planet, you would find only one ounce of it?
Self-defense is a common defense by a person accused of assault, battery, or homicide. The force used in self-defense may be sufficient for protection from apparent harm (not just an empty verbal threat) or to halt any danger from attack, but cannot be an excuse to continue the attack or use excessive force.
Assault and battery are intentional torts, meaning they can serve as the basis for a civil lawsuit demanding compensation in the form of money damages. But in every state, assault and battery are also crimes, meaning that assault and battery can also result in prosecution by the state and, if the accused is found guilty, can result in jail time.