User blog comment:J1coupe/Parappa the Rapper vs. Chorus Men. Epic Rap Battles of Video Games Season 7./@comment-25597255-20150629114709/@comment-5264252-20150629144359

Master Chief was already used [http://epicrapbattlesofhistory.wikia.com/wiki/User_blog:J1coupe/Gordon_Freeman_vs_Isaac_Clarke._Epic_Rap_Battles_of_Video_Games. here].