QUESTION: We hear about the Dajjaal and the Fitnah (tribulations) surrounding him, from which the Messenger (peace be upon him) sought refuge (in Allah), and we have been commanded to seek refuge (in Allah) from his fitnah. So who is the Dajjaal? And what are his attributes?
ANSWER: Dajjaal is a man who will appear towards the end of time, and Jews will follow him. His appearance is a sign of the Last Hour, and he will bring with him immense Fitan (tests and trials) which will have an adverse effect on the Iman (of Muslims). Quite possibly many people may perish because of his Fitnah, except those whom Allah protects.
As for his attributes, he would be a Kafir man, blind in one eye. He will seek to divert people from their religion by whatever means possible. So his Fitnah and danger will be immense. It is obligatory upon us to seek refuge in Allah from his Fitnah, as we have been commanded (to do so) by the Prophet (peace be upon him).
[Sheikh Salih Bin Fawzaan|Al-Muntaqaa Min Fatawa, vol. 2, pg. 97.]