Vilas, like Steven Croft before him, arrived after Northants
had been offered a little hope and immediately kept the chase right on track with clever batting.
Holder strode out to bat at 252 for five in the 40th over and helped add 106 in the final 10 overs as Northants
made their third-highest List-A total.
But the final day descended into farce, with Glamorgan using 10 bowlers, while Northants
' only objective appeared to be breaking as many records as they could.
Keogh turned his overnight 73 into 150 out of Northants
' mammoth 750 all out as the visitors followed Glamorgan's lead in occupying the crease for as long as possible and set a record total at Sophia Gardens into the bargain.
Yorkshire were on top from the start as Matt Fisher removed both Northants
openers in his first over both for 16 and both to leading edges.
Sixteen were needed from the final over and, despite the first ball disappearing for six, Nathan Rimmington held his nerve as Northants
could only make 251-9.
He settled to become a sound partner for Ambrose and repelled Northants
' fightback with the second new ball to compile a record ninth-wicket partnership for Warwickshire against Northants
Having fired Northants
out so cheaply, Warwickshire briefly wobbled to 28 for 3 with Ian Bell held at second slip for a three-ball duck and Jonathan Trott lbw for 4 before Sam Hain and Will Rhodes compiled an unbeaten stand of 81 to ensure the visitors were well on top by the close.
With his 11th delivery Carey had the prolific Northants
opener Ben Duckett caught at cover, then 11 balls later dismissed Shaun Terry who was leg before playing across the line.
But, incredibly, Northants
recovered to make 126 all out and win the tie by 21 runs as the home side folded to 105 all out.
England all-rounder David Willey remains sidelined for Northants
but the Steelbacks have plenty of handy multi-discipline performers stepping up to the plate at the moment in the shape of Josh Cobb, Steven Crook and Rory Kleinveldt.
The first quarter saw Northants
making quick shots, claiming the first few baskets.