A man was attacked with knives, pliers, wire cutters and a drill and told he was going to be injected with cleaning fluid in his own home, a court has been told.
David Thomson, 29, claims Paul Pirrie, 25, who is accused of assaulting and robbing the father-of-two, carried out the attack at his terraced house in Peterhead.
Another man, Nathan Mitchell, 20, admitted his part in the assault on Mr Thomson at a court hearing earlier this month.
Mitchell struck his victim on the head with a coffee table, hit him in body with a drill, attached pliers to his head and body and threatened to inject him with a syringe filled with cleaning fluid.
He cut Mr Thomson on the head and body with a knife and wire cutters and put a knife in his mouth while threatening him and repeatedly punched and kicked him on the head and body, Peterhead Sheriff Court heard.
Mr Thomson was severely injured in the assault and was robbed of personal items including a ring, mobile phone and minidisc player.
Pirrie denies the same charge, claiming he had tried to stop Mitchell, of Connon Court, Port Elphinstone, carrying out the assault.
But Mr Thomson, who has suffered from severe epilepsy since he was a child, claimed Pirrie was responsible for almost all of the alleged assault at the house on Heath Drive, Peterhead, on March 1 last year.
The alleged victim, who said he suffers up to four seizures a day, told the court he had been waiting for a takeaway to arrive when Pirrie turned up at his home with an unknown man, who he identified as Mitchell.
He said Pirrie asked him for £30 he owed him but when Mr Thomson was a few pounds short "everything broke loose".
Mr Thomson said both men had knives during the attack but Pirrie was responsible for cuts to his mouth and neck.
He said: "He tried to put the knife in my mouth and tried to slice right up but it's a really blunt one."
Mr Thomson said Pirrie also threatened to inject him with kitchen cleaner, but that he could not push the syringe through the plastic container.
He added: "I knew there was nothing I could do. I couldn't defend myself. The day after you couldn't see any white on my face, it was black and blue."
Pirrie, of Crossfolds Crescent, Peterhead, denies the charges. His defence agent Ian Jane said Pirrie's DNA was not found on the pliers or on one of the knives recovered from the house and all the items allegedly robbed from Mr Thomson were later found in Mitchell's bedroom.
He said: "This was carried out by Nathan Mitchell alone."