The Satan-worshipping tweens who allegedly plotted to slaughter more than a dozen classmates were hoping to drink the blood and eat the flesh of their victims, according to officials.

Police in Florida said the two female students wanted to pull off the massacre Tuesday at Bartow Middle School so they could “be with Satan,” news station WWLP reported.

The girls, ages 11 and 12, showed up at school around with knives after watching scary movies together over the weekend, according to police. They allegedly confessed to planning to kill at least 15 students in a stabbing spree.

The students — whose identities haven’t been released because they’re juveniles — allegedly brought a goblet with them to drink blood.

“They did make comments that they were willing to drink blood, and possibly eat flesh,” Bartow Chief Joe Hall said in a press conference.

Police arrested the girls after school staff discovered them hiding in the school bathroom with various weapons.

Both girls were arrested and charged with conspiracy to commit murder and possession of a weapon on school property.

Searches of both their homes turned up a hand-drawn map of the middle school with the words, “Go to kill in bathroom,” according to WTVT.

Police also reviewed messages on their phones that showed they planned to commit suicide after the stabbing spree.

“We will leave body parts at the entrance and then we will kill ourselves,” one message reportedly said.