Johann Blumhardt's Rosary

Origin
Johann Blumhardt was a theologian who originated the practice of exorcism to force out evil entities possessing people.

Effects
Separates and manifests the worst aspects and pain of a person into a physical twin. This effect is only temporary, however, as the original person will slowly absorb the twin's energy back into their body. Killing one of the two is the only way to make the effects permanent.

Used by Bonnie Parker to alleviate her pain from her battery acid accident, leaving behind the twin Bonnie Parker when the original was gunned down.