Waylon Walsh, 36, was sentenced in the County Court on Tuesday after pleading guilty to intentionally causing serious injury, trafficking a drug of dependence, four counts of possessing a drug of dependence, and two counts of possessing a firearm as a prohibited person.

Documents released to the Bendigo Advertiser showed on the morning of September 15, 2019, Walsh and a co-offender asked the victim - a 42-year-old man - to come to their Echuca property to buy heroin.

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When the man entered the property, Walsh's co-offender locked the front door. Walsh then came out of a bedroom and started yelling at the victim while holding a knife in his left hand.

Walsh ran at the man and punched him three or four times to the face. The victim fell to his knees before getting back up and grabbing Walsh, swinging him down onto a nearby couch and holding him face down.

Walsh still had the knife in his left hand as the man punched him to the back of the head.

Walsh stabbed backwards in the direction of the victim, striking the man in the right hand and head.

Walsh stabbed backwards again, cutting through the man's mouth and up to his nose and cheekbone.

The man pulled Walsh by his collar onto the ground and stomped on his head before attempting to leave.

As he started to open the door, Walsh came up behind the man and stabbed him twice in the back.

The victim exited the front door before Walsh lunged at him again, stabbing him in the right armpit and cutting him across the chest.

The man tried to stem the bleeding with his jumper. Walsh, after being stopped by a witness, also attempted to stop the man's back from bleeding.

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The witness called 000 and Walsh's co-offender told the operator, "he's bleeding everywhere".

The woman ended the phone call and Walsh and the witness dropped the victim off at hospital. The man had to be flown to the Alfred Hospital in Melbourne for surgery.

Police arrived at the Echuca property a short time later. While detectives were establishing a crime scene, Walsh returned to the house. He was arrested about an hour later.

Police searched the property and seized items including a hunting knife, heroin, and methamphetamine.

During a second search on January 9 last year, police found and seized a sawn-off shotgun, a rifle, a slingshot, and two swords.

Judge John Smallwood acknowledged it appeared Walsh had used the knife as a "last minute thought".

"But you had no right to use the knife," the judge said. "The injuries you caused were serious."

Judge Smallwood said he took into account Walsh was an Aboriginal man who had an acquired brain injury.

He also recognised Walsh had been using drugs since he was a teenager and had been diagnosed with post traumatic stress disorder.

But Judge Smallwood said protection of the community had to be a "significant factor" in sentencing.

Walsh was jailed for seven years with a non-parole period of four years and six months.

His 541 days in pre-sentence detention were reckoned as already served.

Judge Smallwood said if Walsh did not plead guilty, he would have been jailed for 11 years with a non-parole period of seven years.

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