The Joker's iconic and deadly toxin is undoubtedly one of the most devastating biological weapons. But its secret recipe reveals another layer of horror to the Clown Prince of Crime's preferred method of attack.

Joker is one of the most sinister villains in the entire DC Universe, and he has plenty of terrible tricks up his sleeve to help him take on his foes. Acid-squirting flowers, razor-sharp playing cards, and electrified joy buzzers are just some of his favorite insidious tools. But nothing is as demented or lethal as his patented Joker Venom. Anyone whose seen Joker's toxin in action knows how terrifying it is. Not only does it make victims laugh themselves to death, it leaves them with pale skin and a permanent, eerie grin. Since its creation, the Harlequin of Hate's concoction has only gotten more brutal and potent, with the Joker finding new ways to 'improve' on it.