What Happens Later

Whether it's ancient history or modern times anyone who follows Satan will be sent to Hell. 

The only way they won't be sent is if they repent and ask for God's forgiveness. All of people on earth are given chances before it's too late. 

What did Satan Write?

God wrote his ten commandments on Mount Sinai in his own writing. So what did Satan ever write? The devils bible? He had a Monk who was doomed to die and Satan gave him the way to do it. But not by his own writing directly, it just goes to show that God is more powerful than Satan ever was.