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Joker venom

Firemen exposed to the gas.

Joker venom is a deadly toxin used by the Joker. It causes anyone who inhales it to laugh uncontrollably until the point of death, leaving them with a permanent grin on their faces.[1]

Sightings

Known users

References

  1. Hopps, Kevin (writer) & Chang, Michael (director) (October 14, 2011). "Revelation". Young Justice. Season 1. Episode 14. Cartoon Network.

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