Poison the Enemy's Cake 12 January 2013, Cervera de los Montes A4 (29,7 x 21,0 cm) Water color, acrylic color, pencil, color pencil, felt-tip pen and stickers on letter-head paper i Parade is a U.S. discount consumer good brand. Polonium is a chemical element discovered in 1898 by Marie and Pierre Curie. Polonium was usedto murder Alexander Litvinenko, a Russian dissident, in 2006. Cyanide poisoning of humans has occurred many times throughout history, including the murder of Grigorui Rasputin, a Russian mystic, in 1916. Hydrogen cyanide gas was the agent used by Nazi Germany for mass murder in some gas chambers. Tags: cake, poison, cuanide, polonium, hotel 228 / 779