Some sought-after individual cards - such as "Terrorist Nuke", which depicts a scene uncannily similar to the 9/11 attacks - go for more than $50 apiece.
A long-time favourite of collectors,
Magic: The Gathering-style spin-off of the company's
Illuminati board game, which itself was based on the 1975
Illuminatis! Trilogy novels by Robert Shea and Robert Anton Wilson.
Internet users and conspiracy theorists have drawn attention to the cards over the years for the apparent prescience of the irreverent, apocalyptic artwork - notably after September 11, 2001, due to an image resembling the explosion as the first plane hit the World Trade Center, and another depicting flames coming out of the Pentagon.