North Launceston may have taken a while to get going but when they did, the premiers of four of the past five State League seasons gained the ascendancy in spades.
The home side slammed on the opening three goals in five minutes late in the first quarter and seven in the space 32 minutes to all but seal a 14.16 (100) to 4.7 (31) before half-time at UTAS Stadium on Friday night.
Ben Simpson broke the shackles after nearly 19 minutes of no goals, the former Tasmanian Devils under-18 talent slotted a set shot from a clever centring pass backwards.
Skipper Brad Cox-Goodyer added the Bombers' second from the 50-metre arc.
Jay Foon claimed a third goal soon after off a fumbled Blues grab in the goal square, in which rival Casey Brown questioned the ball coming off the Bomber forward's knee.
Launceston got the vital comeback after the siren when captain Jay Blackberry got under a high ball for a strong pack mark and shot from 35 metres out in front.
Cox-Goodyer continued to display his class again from the edge of the 50m mark, with a long left-foot kick on the run. Sherrin Egger goaled next from a set shot following an innocuous free kick.
Bart McCulloch then put the simplest goal away from point blank range when the Blues gave away a soft 50m penalty away.
Cox-Goodyer then stretched the margin out to 36 points approaching time on when he out-positioned Donnellan, marked and sprinted into an open goal for his third.
Much like their late opener, the Blues scored their next at the end of quarter from Jacob Boyd snapped a hurried shot.
But the Bomber machine continued after the break. Will Edmunds snapped a first goal in his first senior game for the Bombers off tap work of McCulloch and a whippy handball from Jack Rushton.
North continued to build on endless pressure on the visitors after Egger sliced his second set shot goal from near the boundary.
It became too easy for the Northern Bombers as Cox-Goodyer was the beneficiary of free kick from Issac Chugg with a 50m penalty ensuring he booted another from outside the arc towards the 69-point victory.