Wellington's record 5-8 knocks Heat out of WBBL|07

Amanda-Jade Wellington has produced the best bowling performance in WBBL history as Adelaide Strikers stormed into Thursday's Challenger final against Melbourne Renegades.

Wellington took a record 5-8 to leave the Heat's powerful batting line-up in disarray, with Brisbane restricted to 8-114 after being sent in by Strikers captain Tahlia McGrath.

Katie Mack then continued her outstanding run at the top of the order, stroking an unbeaten 50no from 42 deliveries - her fifth half-century in seven innings - and sharing in an unbroken 71-run stand with McGrath (38no from 27), to see the Strikers home by eight wickets with 21 balls to spare.

It was a 100th WBBL game to remember for Wellington; in a brilliant spell that included one maiden and 18 dot balls in total, the leg-spinner removed Grace Harrison, Georgia Voll, Mikayla Hinkley, Jess Jonassen and Laura Kimmince, taking her 100th WBBL wicket in the process.

The battle between the Adelaide new-ball pair of Megan Schutt and Darcie Brown (2-18) and Heat openers Grace Harris and Georgia Redmayne had promised much heading into the elimination final, and it was the Strikers pair who claimed bragging rights.

Harris was tied down and struggled to rotate the strike early, facing 17 of the first 18 balls; when Redmayne finally faced her second delivery in the fourth over, she only managed to edge what would have been a leg-side wide from Brown to 'keeper Tegan McPharlin.

Just 25 runs came from the Powerplay and the pressure built by Schutt and Brown paid off when Wellington was introduced in the seventh.

Finding sharp spin and pinpoint control the leg-spinner deceived Harris, who was stumped for a 27-ball 17, and two balls later, Mikayla Hinkley (0) edged to first slip.

No.3 Georgia Voll looked to remain aggressive, hitting two boundaries, but her captain Jess Jonassen (1) managed just a single before she was bowled by Wellington.

In typical Heat fashion Laura Kimmince refused to go into her shell against the leg-spin of Wellington, but she lasted just four deliveries before falling to a stunning catch of Bridget Patterson at deep mid-wicket.

Voll fell a ball later for a 24-ball 20, and while Nadine de Klerk survived Wellington's hat-trick ball, the rot continued when Anneke Bosch was caught behind off Brown the following over, leaving the Heat 7-52.

Wellington produced a maiden to complete one of the most memorable spells in WBBL history, and things went from bad to worse for the Strikers when key pace bowler de Klerk was struck on the inside of her left knee while taking a quick single, the South African left limping after the knock.

But the Protea fought through the pain to remain in the middle, staging a recovery with No.9 Nicola Hancock, who produced a miraculous cameo.

De Klerk hit a crucial 18no from 25, while Nicola Hancock defied the Strikers as she smacked six fours and a maximum in a 26-ball 40, helping their side fight to 8-114 from their 20 overs.

The Heat gave themselves a glimmer of hope when Hancock removed Dane van Niekerk (12) and Poonam Yadav trapped Laura Wolvaardt (16) lbw, but Mack and McGrath took control to steer their side home with ease.

The Strikers will meet Melbourne Renegades in Thursday's Challenger at Adelaide Oval, with the winner to advance to Saturday's Final against Perth Scorchers at Optus Stadium.

The Heat's defeat means a first-time champion will be crowned on Saturday evening.

Brisbane Heat XI: Georgia Redmayne (wk), Grace Harris, Georgia Voll, Mikayla Hinkley, Laura Kimmince, Jessica Jonassen (c), Anneke Bosch, Nadine de Klerk, Nicola Hancock, Courtney Sippel, Poonam Yadav

Adelaide Strikers XI: Dane van Niekerk, Katie Mack, Laura Wolvaardt, Tahlia McGrath (c), Bridget Patterson, Madeline Penna, Amanda-Jade Wellington, Tegan McPharlin (wk), Sarah Coyte, Megan Schutt, Darcie Brown

WBBL|07 Finals

The Eliminator: Adelaide Strikers win by eight wickets

The Challenger: Melbourne Renegades v Adelaide Strikers | Adelaide Oval | November 25, 6.40pm local (7.10pm AEDT)

The Final: Perth Scorchers v TBC | Optus Stadium | November 27 at 4.10pm local (7.10pm AEDT)

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