Nick Opinsky scored the game-winning goal with 50 seconds left in the second overtime period Thursday, lifting the West Eagles to a 3-2 semifinal upset of second-seeded Dimond in the Cook Inlet Conference hockey tournament.
The Eagles will play top-seeded South for the CIC title Saturday at Ben Boeke Ice Arena. The Wolverines blanked Service 4-0 in Thursday's other semifinal game.
West, the tournament's No. 3 seed, lost both of its regular-season conference games against the Lynx, 3-0 and 4-2.
But the Eagles never trailed Thursday at the McDonald Center. They led 1-0 on Jack Opinsky's goal in the first period and 2-1 on Chase Schwamm's power-play goal in the second period.
Jakub Hall's goal for Dimond tied the game 1-1, and Max Hickel's short-handed goal tied it 2-2 with less than four minutes left in regulation.
Dimond outshot West 38-30, including 9-3 in overtime. Connor Batman stopped 36 shots for the Eagles, and Hunter Kattness stopped 27 for Dimond.
Revy Mack registered two assists for West, including one on the game-winner.
In South's win over Service, Nicholas Corbin scored the first two goals of the game to set the tone for the Wolverines. Sam Jemmings and Ryan Bailey each added a goal and Hunter Schmitz tallied two assists.
Zane Anderson made 12 saves for South, which outshot the Cougars 24-12. Kevin Taunton turned back 20 shots for Service.
South and West will play for the championship at 6:30 p.m. Saturday. Dimond and Service meet in the third-place game Friday at 6:30 p.m. at Ben Boeke.