West Coast feasted on an injury-hit Collingwood on Friday night, with premiership hero Dom Sheed plunging yet another dagger into the Magpies' hearts in the 27-point win.
At the venue where they had ended the Eagles' season last year, the Magpies were pummelled in the second half and slipped to 1-4, losing their third consecutive match, 16.7 (103) to 11.10 (76).
With the game at a crossroads late in the third quarter, Sheed stepped in to boot three goals in two minutes and open up a match-winning 41-point lead that proved too much for the Magpies to rein in during a final-quarter rally.
The visitors were left counting the cost of the defeat, with star forward Jordan De Goey (face) and important defender Jeremy Howe (hamstring) both injured in the first half.
It was a significant win for the Eagles, who bounced back to form in a big way in front of a packed home crowd of 54,159 – the largest in the AFL this season after Optus Stadium was opened to 100 per cent capacity.
Dealing with extensive injuries of their own, they showed they have the depth to keep their premiership hopes alive, thriving in the midfield and then dominating through their key forwards.
Jack Darling and Oscar Allen were the stars of the show with five goals each, combining for six goals through the second quarter when the Eagles took charge of the game.
The Magpies used All-Australian defender Darcy Moore in attack, and it looked a savvy move early before he drifted out of the game due to his team's lack of supply, eventually finishing with three goals.
He was key to the Magpies' bright start, along with ruckman Brodie Grundy, who booted two goals, but the Eagles lifted their pressure in the midfield and turned the tide in the second term.
They won the contested ball 43-32 for the quarter and went inside 50 16 times to just six as their key forwards put on a show.
Tough onballer Jack Redden (37 disposals and six clearances) stepped up in the absence of captain Luke Shuey, while fellow midfielders Liam Duggan (36 and 13 marks) and Andrew Gaff (38 and five inside 50s) had big nights.
Alex Witherden (30 and six rebound 50s) made an impressive debut for his second club in defence, while Tim Kelly (28 and seven clearances) shook off a tag from Levi Greenwood to be a crucial contributor.
Stars sidelined as Magpies feel pinch
The losses of Jordan De Goey and Jeremy Howe were telling blows at both ends of the ground for the Magpies. Howe had started opposed to Oscar Allen in a backline missing Darcy Moore and his absence left the defenders exposed, as Allen and Darling combined for six second-quarter goals. Mark Keane battled in aerial contests and Brayden Maynard was forced to play as an undersized key defender. Without De Goey in attack, the Magpies lacked a spark in the second half, going goalless in the crucial third term.
WEST COAST 3.1 9.5 14.6 16.7 (103)
COLLINGWOOD 5.4 7.5 7.7 11.10 (76)
GOALS
West Coast: Darling 5, Allen 5, Sheed 3, Brander, Kelly, Kennedy
Collingwood: Moore 3, Grundy 2, McCreery 2, Mihocek 2, C Brown, Cameron
BEST
West Coast: Darling, Allen, Redden, Sheed, Kelly, Witherden, Gaff, Duggan
Collingwood: Crisp, Pendlebury, Maynard, Grundy, Moore, Mihocek
INJURIES
West Coast: Nil
Collingwood: De Goey (facial injury), Howe (hamstring), Mihocek (shoulder)
SUBSTITUTES
West Coast: Jamaine Jones (unused)
Collingwood: Brayden Sier (replaced Jordan De Goey)
Crowd: 54,159 at Optus Stadium