User blog comment:ImperiexSeed/Supernatural Mysteries/@comment-6449959-20130212215814/@comment-3481504-20130212221005

No, General, Lucifer did not create demons - he created the concept of demons. But it was God who created demon, inadvertently - God created man, and (some) men were turned into demons. No, only God is All-knowing - Even Death's knowledge is limited, and he's older than Metatron.