Wisconsin, US: In a bizarre incident, two 12-year-old girls have been booked for attempted homicide after they stabbed their 12-year-old friend nearly to death in the woods to please a mythic beast they learned about online.

According to the criminal complaint, the girls had been planning to kill their friend for months and finally made the attempt in a park on Saturday morning, after a slumber party.

The juvenile victim suffered 19 stab wounds including one that missed a major artery near her heart by a whisker, doctors told police. The girl was reported to be in stable condition.

The court documents haven't disclosed the name of the victim and the accused because at least one of their attorneys plans to pursue moving her case into juvenile court, where proceedings are secret.

The prosecutors have charged the two 12-year-old southeastern Wisconsin girls as adults with first-degree attempted homicide Monday in Waukesha County Circuit Court.

Both the girls face up to 60 years in prison if convicted. A court commissioner has set the bail amount at $500,000 cash per child.

According to the complaint, one of the girls reportedly told a detective they were trying to become "proxies" of Slender Man, a mythological demon-like character they read about on creepypasta.wikia.com, a website about horror stories and legends.

They planned to run away to the demon's forest mansion after the murder, the complaint said.