Northern Superchargers snapped Southern Brave's eight-match winning streak to clinch their first Hundred title and deny their opponents a second as well as the first unbeaten season in the tournament's five-year history.
Brave had been impeccable throughout the group stage, including beating Superchargers by eight wickets at home but they came unstuck in Sunday's Lord's final, losing by seven wickets.
Georgia Adams' side were restricted to an under-par 115-6 before Superchargers reached their target with 12 balls to spare after a six from Annabel Sutherland (28no off 25) to exact revenge for their 34-run defeat to Brave in the 2023 final.
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Brave would have taken two wickets in as many balls - and reduced Superchargers to 60-4 after 45 - had they reviewed for Nicola Carey (35no off 25) lbw to Chloe Tryon, moments after Phoebe Litchfield (26 off 13) was out to a limp sweep following a four-laden cameo.
Australian duo Carey and Annabel Sutherland guided Superchargers home with an unbroken stand of 60 from 44, although Carey had another scare when a delivery from Lauren Bell - the tournament's leading wicket-taker - hit the bail but it stayed in its groove.
Sutherland (2-23) and Kate Cross (2-23) had earlier starred with the ball - Cross' wickets of Maia Bouchier (13) and Laura Wolvaardt (0) coming from successive deliveries.