The artist, who has been in custody since January 24, currently faces a total of 15 felony charges, three more than he faced during his last court appearance in late May.
The laundry list of charges includes two counts of sodomy, one count of rape of a victim incapable of consent, one count of oral copulation against the victims will and three counts of corporal injury to a cohabitant.
Numskull, who was previously convicted on drug charges in 1993, is also charged with three counts of possession of a firearm by a felon, two counts of dissuading a victim from reporting a crime, one count of making criminal threats and two counts of vandalism over $400.
If found guilty of his multiple sex charges, Numskull, born Garrick Demond Husbands, faces a minimum of 25 years to life and would have to register with the State of California as a sex offender.
The victim is identified only as Jane Doe in a complaint filed by the Alameda County Deputy District Attorney on May 22.
The charges stem from multiple events taking place between March 15 and April 9, 2007, when Numskull was originally arrested.
The documents seem to indicate that the victim, identified as his cohabitant, reported the other previous instances of domestic violence at that time.
Numskull is next scheduled in court on June 18, for a pre-trial hearing.
His bail has been set at $245,000.
As one half of The Luniz, Numskull attained international popularity in the mid nineties, following the release of their debut album Operation Stackola, which, powered by the megahit single I Got 5 on It, knocked Michael Jacksons album HIStory out of the top position on Billboards R&B charts.
Numskull pursued a solo career following the release of The Lunizs sophomore effort Lunitik Muzik in 1997.