Ellyse Perry capped an all-star performance with the match-winning six as Sydney Sixers beat Melbourne Renegades to reach a fourth straight Women's Big Bash League Final.
Perry launched Molly Strano into the stands from the fourth ball of the Super Over after Sixers - champions for the past two seasons and beaten finalists in 2015-16 - had notched singles from the first three deliveries as they topped Renegades' score of six in a thriller at Drummoyne Oval.
Sixers - who saw Renegades match their total of 131 in the regulation 20 overs - will now be targeting a third title on the spin when they meet first-time finalists Brisbane Heat next Saturday.
The two-time winners are indebted to Perry for that feat remaining possible after she hit an unbeaten 54 from 59 balls, took a wicket, held a catch, secured a run out and then bowled the 20th over of the Renegades innings to take the game into overtime.
Perry batted throughout Sixers' 131-4, striking her eighth 50-plus score of the season and sharing an unbroken 98-run partnership with the more aggressive Dane van Niekerk (51no off 36) as the team rallied from 33-4.
The 28-year-old then bowled Emma Inglis for a duck, ran out Amy Satterthwaite from for two, and then caught Jess Cameron for 44 to end a 60-run stand with Sophie Molineux (55) for Renegades' fourth wicket.
Renegades required 13 from the final over to reach their first final but Perry limited them to 12, with Molineux run out from the final ball attempting what would have been a match-winning third run.
England's Danni Wyatt was run out in the Super Over, during which Sixers seamer Marizanne Kapp conceded just four singles and a two, leaving Player of the Match Perry to strike the decisive blow.
Heat's semi-final was also dramatic as they edged inaugural champions Sydney Thunder by four runs. SCORECARD
Thunder needed four from the final ball to equal Heat's 140-7 and take the game into a Super Over and seemed set to get it as Jess Jonassen slog-swept Nicola Carey towards the boundary - only for Haidee Birkett to run round from deep square leg and take an excellent catch.
Heat could now become the first side outside Sydney to win the Women's Big Bash, with Thunder beating city rivals Sixers in the first final and Sixers then besting Perth Scorchers in 2016-17 and 2017-18.