Marvin Jones III (born July 9, 1976), also known as Krondon, is an American rapper and actor from Los Angeles, California. He is a member of the group Strong Arm Steady, along with rappers Phil Da Agony and Mitchy Slick. As an actor Jones portrays the character Tobias Whale in The CW superhero television series Black Lightning, and voices Tombstone in the superhero film Spider-Man: Into the Spider-Verse. Strong Arm Steady formed in 2003, and released its debut album Deep Hearted in 2007 followe ...