Luke tried to shut Palpatine out, but ended up calling his hilt into his hand and moving to kill Palpatine with his green saber. Vader blocked the blade  and the two lightsabers crisscrossed in front of the cackling old Sith.<br/><br/>Luke leaped back and turned off his blade, "Father, enough...you know he's only using you. Come back with me, and we can-"<br/><br/>"You are UNWISE to lower YOUR DEFENSES!" Vader struck out at Luke, who ignited his blade at the last second and staggered back.<br/><br/>"There is no reason to persist, young boy. You...like your father....and your friends...are now..mine!" Emperor said with a sneer.