Inspirational captain Jackson Moye and forward Zach Walgers led Marrar to a 90-point demolition of finals hopeful Coleambally on Saturday.
The 18.9 (116) to 4.2 (26) result has the Blues in danger of crashing out of the five next week but brought up two important records for the Bombers.
They'll go into finals having enjoyed a win against every team in the competition, and completes a perfect record at Langtry Oval through three seasons under coach Shane Lenon.
"It's pretty special," Lenon said. "It's a good effort in anyone's language and something we're very proud of. One of our goals each year is to win every home game and to do that for three years, it's a good achievement by the group. It may not be repeated again at Marrar."
Marrar picked up where they left off in last week's 11-goal thumping of East Wagga-Kooringal.
Four goals to two against the breeze in the first quarter set the tone and five goals in a 10-minute period early in the second set them on track. They didn't look back, as a 13-point lead was out to 43 by half-time and 62 by the last break.
"Confidence is a big thing, especially with a young group and they carried on from last week," Lenon said.
"They're playing with that confidence and it's a good time of year to be."
There were setbacks with wingman Damian O'Donoghue injuring a hamstring, and Matt Parks a knee after a strong game at centre-half-back.
Captain Moye produced a second brilliant effort in as many weeks to claim best-on-ground in a special game for Marrar. He was awarded the Graeme Reid Medal in a match in which they remember their late teammate, and support the Good Talk Foundation.
"He leads by example. When we don't have the ball he tackles and applies pressure, and his ability to win the ball at the contest and around the stoppages is brilliant. He does everything you want a captain to do," Lenon said.
He follows brother Brad Moye (2018) and former skipper Josh Hagar (2017) in being awarded the medal.
Reid's brother, Walgers, wasn't far behind. The forward kicked another five goals, taking him to 45 for the season and third in the league's leading goalkickers.
The Bombers head to Barellan for the last round, where a win is likely to see them finish second behind North Wagga on percentage, unless the Saints are upset by the Northern Jets at home in their last game.
Coleambally, who were well served by Tom Morton, Charlie McAdam and Adam Mannes, have to pick themselves up for a virtual elimination final at Charles Sturt University, for the right to play in the actual elimination final the following week.
They thumped the Bushpigs by 10 goals when they met in Coleambally mid-season. But questions about their form away from home only grew louder at the weekend, given they beat Marrar by five goals mid-season in Coleambally, only to lose by 15 goals in the return fixture. They've lost six out of seven games away, winning only at Barellan on the road.