Jurors have heard details of a "diabolical" pact a teenager made with a demon before he is accused of murdering two sisters in a park.

Danyal Hussein allegedly used his own blood to sign an agreement with a demon named Lucifuge Rofocale in which he promised to “sacrifice” women in exchange for winning the lottery – and get away with it, a court heard.

In another note, he offered blood for “sexual potency” and to make a girl at his school fall in love with him, jurors were told.

Hussein is appearing at the Old Bailey charged with the murder of sisters Bibaa Henry and Nicole Smallman, whose parents Chris and Wilhelmina Smallman are from Ramsgate.

Armed with a knife bought in Asda, the 19-year-old launched a “terrifying” attack on Ms Henry, 46, and Ms Smallman, 27, in Fryent Country Park in Wembley, north London, the prosecution allege.

Having cut his hand in the process, he then dragged their bodies into bushes without a thought for their dignity, prosecutor Oliver Glasgow QC said.

The sisters, who had been celebrating Ms Henry’s birthday with friends, were found the following day by Ms Smallman’s boyfriend.

Hussein, who declined to give evidence, has disputed DNA found at the scene or that he was caught on any CCTV, including footage that shows a person returning to his home after the killings in the early hours of June 6, last year.

In his closing speech, Mr Glasgow QC told jurors: “Given the weight of the evidence against him, only someone who actually believes that an agreement with a demon will work could refuse to accept any aspect of the case against him.

“Perhaps he still believes that Lucifuge Rofocale will come to his aid, but unfortunately for the defendant, there are no deals to be had in these courts and the devil (if he is anywhere) is in the detail.”

Outlining the tragic circumstances, he said: “For Bibaa Henry and Nicole Smallman, Friday, June 5 was supposed to be a celebration of life; a birthday party, a night where you reflect on the year you have had and look forward to the year that will be.

“It was supposed to be an evening of friendship and love; a chance to spend time with those closest to you.

“And it was supposed to end with both sisters returning home to their loved ones with smiles on their faces and fond memories to look back on.

“For this defendant, however, the celebration he had planned was quite different.

“It was a celebration of death, not of life; it was a night of sacrifice and violence, not of shared emotions; and it was the start of his planned campaign of vengeance that would see part of his twisted bargain fulfilled and leave him looking forward to the riches he believed would soon come his way.

“It is hard to imagine that anyone could do to another human being what this defendant did to Bibaa and Nicole; but to have planned it, to have prepared it and to have performed it with such ruthless selfishness it truly terrifying.

“He did not care what he had to do to get what he wanted, and these two women were nothing more than a means to a very disturbing end.

“Indeed, the last few minutes of Bibaa and Nicole’s lives must have been truly terrifying.”

The defendant’s claim that someone else wrote the agreement to sacrifice women for a lottery win was almost as ridiculous as the document itself, the lawyer asserted.

“The person responsible for this perverse document and the person responsible for the brutal slaying of two women are one and the same individual: this defendant,” Mr Glasgow said.

He also dismissed a suggestion by the defence that the crime scene could have been contaminated, saying there was no evidence from Hussein to explain how his blood and DNA got there.

Earlier, trial judge Mrs Justice Whipple warned jurors not to be drawn into speculation or influenced by emotion as they assessed the evidence.

On the central issue of the case, she said the prosecution say the evidence shows the killer was Hussein while the defendant asserts that the jury “cannot be sure of that”.

Hussein, of Guy Barnett Grove, Blackheath, south-east London, has denied two counts of murder and possessing a knife.

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