Daniel Keyes' Pen

Origin
Daniel Keyes (August 9, 1927 – June 15, 2014) was an American author best known for his Hugo award-winning short story and Nebula award-winning novel Flowers for Algernon. Keyes was given the Author Emeritus honor by the Science Fiction and Fantasy Writers of America in 2000.

Effect
This pen was used by Keyes to sign copies of Flowers for Algernon. The pen decreases the user's mental ability, similar to the main character of Flowers for Algernon, Charlie Gordon. If not stopped, the user will go brain-dead.