Jonathan Ryan Davis must register as a sex offender for 25 years. Picture: Facebook

Jonathan Ryan Davis was last week sentenced to 10 years’ probation after pleading guilty to the disturbing December 2014 sex attack in the US city of Pittsburgh.

Police said Davis made his victim and two other young girls drink each other’s blood in a game called Mabinogi he found online, WPXI reported.

He told police that after licking the blood, he called each girl his “bio-child” and said he would be their “dad” in the “cult-like” group he orchestrated.

“I’m sorry for everything, all the pain and suffering I had everyone go through in this case,” Davis told Judge Richard McCormick Jr, according to the Pittsburgh Tribune-Review.

In addition to probation, the judge barred Davis from using the internet for recreational purposes, drinking alcohol, going to clubs, looking at pornography and spending time with children unsupervised.

Jonathan Ryan Davis played out his sick fantasies in a church stairwell. Picture: WPXISource:Supplied

He will also spend two years under house arrest and must register as a sex offender for 25 years.

The Tribune-Review reported a juvenile court previously convicted Davis for impregnating a 12-year-old girl when he was 17. He now has a five-year-old child.

In court on Thursday, Assistant District Attorney Chris Flanigan said the probation he received in that case didn’t seem to teach him a lesson.

Jonathan Ryan Davis has avoided child. Picture: WPXISource:Supplied