Question: In the end of times, who will reappear first, Jesus or Imam al-Mahdi?

Answer: Jesus 

Question: What will Jesus do in the end of times?

Answer: He will preach the unity of God, refute the trinity and ally himself with Imam al-Mahdi 

Question: Is the Dajjal a person or a system?

Answer: The Dajjal is most likely a jinn working under Satan, but he may also be a system. 

Question: What does Dajjal mean?

Answer: It means the great liar or deceiver 

Question: What happens when Imam al-Mahdi dies?

Answer: The world will end and the Day of Judgment will begi