The Magpies made a blistering start and withstood a spirited second-half response from the Lions to prevail 11.9 (75) to 8.10 (58), recording their fifth triumph of the campaign.
Cohen Paul starred in attack with four goals for the home side - taking his tally to 18 strikes in just nine outings this term - while Will Creevey and Mitchell Walters also kicked two apiece.
Euroa established the foundations of its victory during a dominant opening half, holding Seymour scoreless in the first quarter and taking a 12-point advantage into the first break - as Creevey kicked the only goal of the opening term..
Seymour finally registered its first score during the second quarter, but Euroa proved relentless as it piled on five unanswered goals via two from Paul and strikes from Zac Gleeson, Creevey and Walters to establish a 42-3 advantage.
Late goals from Nathan Fowler and Nicholas Quigg gave Seymour something to take into the main break, reducing the deficit to 27 points at 6.6 (42) to 2.3 (15).
However, Euroa again landed the opening blows after half-time as Jack McKernan and Paul pushed the margin out beyond six goals.
The Lions began to find some momentum as the third quarter progressed.
Jaron Murphy and Tom Maloney kicked majors as Seymour won the term by three points, but the visitors’ inaccurate return of 2.5 prevented them from applying greater scoreboard pressure.
Euroa remained 24 points clear at the final change, leading 8.8 (56) to 4.8 (32), before putting the result beyond doubt early in the last quarter.
Archie Wilson and Walters kicked goals before Paul completed his four-goal performance, stretching the Magpies’ advantage to 36 points.
The Lions kicked the final three goals of the afternoon to add some respectability to the scoreboard, but Euroa’s commanding start had left them with too much ground to recover.
The victory improved Euroa’s record to 5-10 and kept it in 10th position, while Seymour remained third at 10-5 despite suffering a costly defeat in its pursuit of the top two.
Reflecting on the hard-work shown by his team en route to maximum points, Magpies vice-captain Lachlan Hill’s pride was palpable.
“We knew they were going to be pretty handy as they’re a top-three side,” he said.
“But we’ve been playing some really good footy these last three or four weeks and we knew if we got the footy on our terms, we could really take it to them.
“That’s what we did - we started well and the pressure was good - it was a great result and we were stoked.
“Everyone bought in, our back six was unbelievable, our main focus was to win the contest and that’s what we did.
“Jack Welders was really good and Nick Asqwuith has had an unreal couple of weeks, he had a great game.
“Also, Cohen Paul down forward - you just can’t stop him, he played very, very well.”