Promethium 90
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Real Identity: Not Applicable
Appearances: Deep Cover for Batman!
Powers/Skills: Radiation
Voiced By: Not Applicable
Promethium 90 is a rare isotope of the element housed in a nuclear plant in Gotham City. With a low half-life, the isotope is kept in a special container. The isotope became the target of the Injustice Syndicate when it required a power source for its bomb.