UPDATE: In speaking with Ambrosia For Heads, Murs has clarified that he will not be freestyling. Instead, he will be undertaking a “Rap marathon,” where he raps his own songs and other classics.

In 2008, Los Angeles, California MC Murs campaigned with his Warner Bros. album, Murs For President. Eight years later, the onetime member of Living Legends and Felt is out to snatch a Guinness World Record.

Although not in Guinness‘ online database, Bentonville, Arkansas MC Romane Armand boasted a 24-hour-and-49-second freestyle that took place August 16-17, 2014. In a video from the feat (posted below) Armand posed with what is believed to be a Guinness certificate. Controversially, on November 29, 2014, Hawthorne, California MC Red Cloud achieved what was reported as a record-breaking 18-hour-one-minute-and-14-second freestyle at the Airliner in Los Angeles, California. Previous record holders include Chiddy (of onetime Top 10-charting Hip-Hop duo Chiddy Bang) at nine hours and 18 minutes. The Philadelphia, Pennsylvania native now known as Chidera Anamege achieved the feat on April 29, 2011. Unlike some others, this record was reportedly documented by Guinness.

Chiddy Bang’s “I Can’t Stop (Freestyle) Video”

That was three minutes longer than the 2009 proclaimed record holder, Longtime Canibus affiliate, Indianapolis, Indiana MC M-Eighty—who clocked in at nine hours and 15 minutes. Toronto, Ontario MC D.O. previously held a 2003 record at eight hours and 45 minutes. Los Angeles, California’s Supernatural is also credited with a nine-hour freestyle, although not recognized by Guinness at the time. Murs and Supernat’ have collaborated extensively throughout their careers.

Murs appears to be out to defeat all records, Guinness and otherwise, in his upcoming challenge.

Almighty (Canibus, Bronze Nazareth, M-Eighty & Nino Graye) – F.A.M. ft. Kool G Rap

According to the Guinness website, the record for longest freestyle rap by a team is held by KJ52 Freestyle Team, who rapped for 12 hours and two minutes in Tampa, Florida on January 12, 2014. The website does not have individual records.

Black Thought, Del, Murs & Fashawn Make An All-Star Collabo About The Fight Within (Video)

Murs, now a Strange Music artist, told Billboard, “We were talking about Boost [Mobile’s] unlimited music streaming program and how to get that across to consumers. I’m like we can do a 24-hour rap and started suggesting people for it. The more I talked, the more it seemed like something I could do…But this will be live streamed for all 24 hours. People can go to bed, wake up and make sure I’m still rapping. Whenever you want to tune in, I’ll be there for 24 hours.” Boost Mobile recently launched an unlimited streaming plan, with content care of Slacker Radio. Murs will host Where You At? L.A, a new series featuring performances and freestyles. The series premiered last night (July 13). September 28 will mark the day the longtime 9th Wonder collaborator goes for the record book, with the adventure called “Bars For Days.”

Talk About Ambition… Charles Hamilton Freestyles… For Nearly 19 Minutes (Video)

#BonusBeat: Video footage of Romane Armand’s 2014 24-hour freestyle:

Last year, Murs released Have A Nice Life.