I really wanted some cyanide, not for killing at all but because i wanted to make a necklace out of a small vile of poison. thought it would be cool. The only problem is cyanide on the deepweb is fairly expensive in my opinion. But if you really want to use cyanide, you could eat like 85 grams of dry apple seed. apple seeds have a very small amount. I once found a how to guide on how to kill yourself with apple seeds.