Who is behind the scheme to test king Arthur's knight?

Was the Persian Empire in existence before or after ancient Egypt's Middle Kingdom? Where does the name Karin come from? What century is 210AD IN? What areas in life were improved Sumerian inventions? Did Anastasia do any accomplishments? How does Odysseus get his men past the monster? Who causes the storm that nearly kills Odysseus while he is on the raft on his way to the island of phaeacians? A member of the ancient greek school of philosophy founded by zeno of citium? Who is polydectes how did he try to get rid of perseus? Where does the word Principality derive from? Who was the main character of The Aeneid? A civilization exists in a mountain valley for several hundred years developing its own language in isolation from nearby civilizations? Who was the goddess Athena last seen with? What does hecate control? What is shikhara? How did Minerva become the war goddess? How did the Greek god and goddesses changed the Greeks' life? How old is Hermes god? What ancient civilizations used theocracy? Who was Hades consort?