Brisbane have made their third Grand Final in a row, at the expense of the team that knocked them off in the decider just two years ago.
It wasn't pretty, with mistakes from both sides, and several Lions playing hurt to get the side over the line.
Now a rematch from three weeks ago against Geelong awaits.
The Sporting News looks at who helped propel the Lions to another Grand Final.
MORE: AFL Preliminary Final Collingwood player ratings: Pies come undone without Scott Pendlebury
Who won the game for the Lions?
Hugh McLuggage: 10
Craig McRae said before the game that Steele Sidebottom would go with him, but I'm not sure anyone noticed. Hugh McLuggage certainly didn't. The matchup was soon dropped, but the Pies weren't able to think of any other answer. Finished the night with an absurd 37 disposals, eight marks, six inside-50s, a goal, and countless broken tackles.
Does a rematch with Oisin Mullin await?
Zac Bailey: 9
Jamie Elliott sent a strong message to the All-Australian selectors on Saturday night, but Zac Bailey showed why he was deserving of his spot. Arguably the Lions' best player in the first half, with 16 disposals and a goal in the first two quarters. Kicked a massive goal to start the third quarter, which put the Lions on the path back to a Grand Final.
Just one disposal in the final term as the Lions blew the game away, but he laid the ground work for a monster win.
Darcy Wilmot: 7.5
He debuted in a final, and he showed yet again why he was made for this stage. Incredible burst off half back, and stood tall for eight marks, leading to 25 disposals. Gave away a silly 50 in the second quarter which helped put Collingwood in the box seat, but his seven disposals in the third quarter were important in turning the game around.
Ty Gallop: 9
To this day no one can talk about Mason Cox without mentioning his incredible 2018 preliminary final against Richmond, but Ty Gallop's performance on the same stage at just 19-years-old against the Pies deserves the same treatment. Darcy Moore was arguably the best player in week one of the finals, but Gallop got the better of the Pies skipper, kicking three crucial goals, and perhaps more importantly, refusing to be outmarked. Took four big grabs himself, and after announcing himself this September, it looks like him and Logan Morris will make quite the partnership moving forward.
Harris Andrews: 8
The Brisbane captain lining up on Mason Cox was the most talked about matchup heading into Sunday night, and Andrews was the clear winner. Finished with a game-high 13 marks, as well as an equal game-high nine intercept possessions, and took several intercept marks (albeit, not against Cox) in the game-defining third quarter to stop multiple Collingwood attacks. Was one of the best Lions against the Cats three weeks ago, and he enters the decider in brilliant form.
Who needs to lift next week?
Charlie Cameron: 4
The fall off of Charlie Cameron is a mystery that needs to be studied. Just as much of a mystery is how the Lions' thin forward line is able to produce such high scores without arguably their biggest x-factor at his best. It was a rough start for Charlie, but he still ended the night with a massive goal and 15 disposals.
But when the Pies threatened to rip the game away from the Lions, he had his opportunities to halt their momentum and couldn't capitalise. One goal from four shots at goal isn't what we've come to expect from him, but he still could give the Cats a major headache next week.
Dayne Zorko: 2
Was basically responsible for all of Collingwood's first four goals, which nearly propelled the Pies into another Grand Final. Collected himself at halftime to accumulate 14 disposals in the final two quarters, and be involved in a few of the Lions' goals, including putting the icing on the cake himself. But the Pies were only ever in the game because of him, and Jamie Elliott.
Cam Rayner: 4.5
If he was consistent... imagine. Didn't have a kick to halftime, and while he only emerged from the main break with five disposals, kicked two massive goals and took some huge grabs that will have Brayden Maynard struggling to sleep for the next week. But if the Lions are to reverse the result against the Cats from a few weeks ago, they will be hoping the former number one pick will be play four quarters.
Oscar McInerney: 2
After the heartbreak he experienced this time 12 months ago, it's hard to argue anyone deserves the chance to play in a flag next week more than Oscar McInerney. But if he is to get that chance, he will have to survive a nervous wait at the selection table during the week. Played forward-ruck, only winning 11 hitouts and taking just one mark, for zero goals.
It's been speculated for much of the year that the 2025 season will be his last due to his body, and he moved like someone who was playing hurt.
Kai Lohmann: 3
Was able to get the goal that put the game well and truly out of reach, but his impact was hardly felt before that. Should've snapped a goal from 15 metres out in the third quarter, but an unusual miss continued to keep the Pies alive. Ends the night with 17 disposals, but at an abysmal 41 per cent disposal efficiency. Multiple times he should've passed to teammates in better spots and he overlooked them, which Charlie Cameron wasn't afraid to let him know about.
But, we know that he knows how to perform on the biggest stage, and next week he will be looking to pick up where he left off last year.