Geelong have rediscovered their ruthless premiership best with a near-perfect 93-point thrashing of Sydney in the AFL grand final rematch.
After cantering to a 81-point win over the Swans in last year's decider, the Cats left more scars on John Longmire's team with another obliteration on a night they unfurled their 10th premiership flag at Kardinia Park.
Earlier, Port Adelaide did the business against West Coast for a 40-point win, while Brisbane recorded a 21-point win over GWS in Canberra.
Apart from a brief period of resistance from the Swans late in the second quarter, Geelong were in always in control to shell-shock the visitors with extreme pressure and triumph 20.10 (130) to 5.7 (37).
It was the Swans' heaviest defeat in 289 games under Longmire, eclipsing the 89-point belting to Hawthorn in 2015 as they added a meagre 0.3 in the second-half.
Star Geelong forwards Tom Hawkins (five goals) and Jeremy Cameron (five) took full advantage of the Swans' decimated defence without Paddy McCartin, Tom McCartin and Dane Rampe.
Callum Mills, who began his career as a defender, started on Hawkins in a clear height and weight mismatch, but the experiment ended midway through the third quarter when the Swans co-captain shifted back into the midfield.
Cameron continued his extraordinary start to the season as arguably the best player in the AFL to be firmly in Brownlow Medal contention.
The match started in ominous fashion for the Swans when Geelong's Sam Simpson, who has battled concussion issues, booted the opening goal and was mobbed by teammates to the delight of the parochial Cats crowd.
The Cats stormed to a 27-point lead at quarter-time, before breaking Sydney's spirit in the third term to take a 78-point advantage into the final change.
This was equal to anything they produced during their spellbinding 16-game winning-streak to claim last year's flag in a performance that will gives rivals across the AFL shudders.
Geelong have levelled the ledger at 3-3 after opening their premiership defence in shaky fashion with consecutive defeats to Collingwood, Carlton and Gold Coast.
Legendary captain Joel Selwood, who retired after 355 games and four premierships following last year's premiership, returned to lead the unveiling of the flag before the match.
He was joined by 2011 premiership skipper Cameron Ling and Geelong's AFLW captain Meg McDonald.
On a disastrous night for the Swans, they lost youngster Matt Roberts to a knee issue during the second term to add to their mounting injury list.
Lions on the up as Giants are cast aside
Charlie Cameron's career-high seven goals have helped Brisbane make it three wins on the bounce, beating GWS by 21 points at Manuka Oval.
The Lions never looked like losing but struggled to shake off the gallant Giants in moving to 4-2 for the season while and continuing to build into their campaign.
Red-hot Brisbane livewire Cameron made it 17 goals in his past three outings, none more special than an audacious mid-air flick more resembling a soccer striker than an Australian rules small forward.
He slotted three goals in the third quarter alone as the Lions put the foot down and looked to break the GWS fight with five of the half's first six goals, their lead peaking at 41 points.
But the Giants fired back to maintain their record of competitive games under new boss Adam Kingsley, the 21-point margin the biggest differential in any of their six games this year.
Brisbane looked on for a big evening, kicking the first three goals of the game, but they couldn't shake a dogged Giants outfit who benefited from a career game from an unheralded midfielder.
Xavier O'Halloran came into the contest with six career goals in 34 games but found a remarkable three in the first half alone, including two long bombs from outside 50.
It helped them stay with 19 points at half-time, with a combined 79 touches for prime movers Josh Kelly and Stephen Coniglio keeping them within touching distance throughout the contest.
The pointy-end of last year's draft traded blows early, GWS' number one pick Aaron Cadman capping a strong mark with a goal before Brisbane's number two Will Ashcroft responded immediately with a classy running major.
Along with Cameron, Daniel Rich starred for the Lions with 27 touches in his quarter-back role.
It continued a poor run for GWS at their secondary home, now losers of their past eight starts at Manuka Oval.
They had enough of the ball and even won uncontested possession by 91, but lacked structure at times and couldn't handle the Lions' stacked attack.
Small forward Brett Daniels found four goals in an impressive cameo that kept his side in the hunt.
The loss was further soured for the Giants with an injury blow for All-Australian defender Sam Taylor, who left the game in the third quarter with a suspected hamstring tear.
And Adam Kennedy joined him in the casualty ward just minutes after entering as a substitute, hurting his knee after copping a bump from Brisbane speedster Keidean Coleman.
GWS veteran Callan Ward might get some match review officer scrutiny for a sling tackle on Lachie Neale, although replays suggested the Lions star may have contributed to his head hitting the surface.
Port cruise past Eagles to keep winning run going
Connor Rozee has claimed his second successive Peter Badcoe VC Medal, propelling Port Adelaide to a clinical 40-point victory against West Coast at Adelaide Oval.
Rozee (29 disposals, two goals), Jeremy Finlayson (five goals) and Willem Drew (25 disposals, one goal) all starred as the Power made it three straight wins with their 16.13 (109) to 10.9 (69) triumph on Saturday afternoon.
The result was dampened by forward Todd Marshall suffering a concussion, while captain Tom Jonas faces a date with the match review officer following his bump on Jai Culley.
Marshall was substituted out midway through the second period after his head accidentally clashed with Liam Duggan's shoulder.
Shortly before half-time, Jonas collided heads with Culley after electing to bump the young Eagle.
Culley shrugged off the hit to slot three of his personal-best four goals after the main break.
Luckless Luke Shuey, back from a hamstring injury, was not so fortunate, the Eagles captain hurting his left ankle in an Ollie Wines tackle early in the game and eventually being substituted in the third quarter.
Behind Bailey Williams' centre-square grunt — in the air and on the deck — West Coast's seasoned campaigners Shuey, Tim Kelly and Andrew Gaff more than matched Port's engine room in the clinches.
But the Power were cleaner and had more contributors when it mattered, particularly during their match-winning 6.4-to-1.3 second term, which turned a slender five-point quarter-time edge into a commanding 36-point half-time cushion.
Finlayson slotted his fourth goal in the opening 90 seconds of the third period before dishing off to Sam Powell-Pepper moments later as Port pushed 48 points clear.
With Shuey's afternoon ending, Kelly's big third quarter piloted a belated rearguard before Ryan Burton crept forward, juggled a one-handed mark and converted expertly from the outer pocket to the River End.
The Eagles, as they did at the same venue six days earlier against Geelong in Gather Round, matched their opposition after half-time, but the damage had already been done.
Ladder
AAP