Sean Michalevich of the Stettler Lightning scored five times and added two assists in two games.
The 19-year-old Stettler product scored a hat trick in a 12-4 win over Ponoka on Nov. 7.
And the 6-foot-3, 210-pounder was right back at it the next night with a pair of goals and two assists in a 6-4 victory over the Stamps.
Last year, the Airdrie Techmation Thunder were the last team standing.
They came a few steps short this spring.
Travis Gerrard scored with less than a minute remaining as Mountainview eliminated the Airdrie in Game 6 of their second-round series.
Damian Vickers, Sam Kolke and Laine Rothenbusch also scored for the Colts.
Jordan McConnell, Tyler Petrie and Sebastian Iannuzzi scored for the Thunder, who won't play in the Division Final for the first time since 2016-17.
Thunder bench boss Derek Stamp said it was a tough night for the defending provincial champions.
"It's tough," Stamp said. "Everyone is disappointed and feeling pretty lousy … everything is just really raw right now. It will still be disappointing tomorrow when we all wake up, but easier to reconcile and deal with.
"We just came up short. The Colts played well and pushed the entire series.
"I feel for our 21-year-olds as this isn't the way they wanted to end their junior careers and they did so much for us this series."
Colts win best-of-seven series 4-2
Game 1: Colts 2, Thunder 1 (OT)
Game 2: Colts 8, Thunder 6
Game 3: Thunder 4, Colts 3
Game 4: Colts 11, Thunder 5
Game 5: Thunder 6, Colts 2
Game 6: Colts 4, Thunder 3
Vipers 5, Wranglers 4
The Vipers are officially back in the series.
Trailing 3-2 entering the final frame, the Vipers exploded for a trio of goals to seize control of the game.
Jace Paarup and Rylan Burns scored two goals apiece while Cole Hardman also found the net as Red Deer won its second straight game.
Brett Westin potted a pair while Braidon Westin had a goal and two helpers. Payton Wright also scored for Sylvan Lake.