Poisoned Deck of Jokers

"Darn it! Cut myself on the edges - sure are sharp, brand new deck! Wha- the Joker! ALL JOKERS!"

- Edgar Martin

Joker once used a deck of seemingly ordinary joker cards to murder a victim.

History
After announcing to the public that he would murder Edgar Martin at midnight, Joker placed a deck of playing cards with edges poisoned with Joker Venom on a table at the man's home. Edgar decided to play cards with the policeman guarding him the evening after the threat. He picked up the deck which obviously had the correct weight of a playing card deck, but noticed how sharp the new deck was, cutting his finger on their edges. When he layed down the first card it was a joker and quickly realized they were all jokers. As the poison overtook him the policeman grinned holding up a card, revealing he had been the Joker all along.

Background Information and Notes
These cards with sharpened edges may have been the inspiration for the steel throwing cards seen Batman: The Animated Series.