Belvoir off-spinner Lachie McMillan took advantage of a tricky wicket to claim his first five-wicket haul at 50-over level in Saturday's win over New City.
It was one of only two completed matches of the second round with rain preventing play in two games, while the other one started, but the team batting second held out for a draw.
Home team New City was skittled for 89 from 34 overs, with the Eagles passing the total four wickets down from just 17.1 overs.
"If they (openers John Spencer and Nat Sariman) didn't go at the run rate they did, we probably wouldn't have got a game in, we hit the winning runs and a minute later it belted down," McMillan said.
The match finished around 4.45pm with Spencer hitting five fours in his 24 from 21 deliveries, while captain Sariman posted 28 with four boundaries.
It was the ideal toss to win and the Phoenix was soon in trouble at 2-13.
However, a 40-run stand between opener Cooper Davies and former Indian Premier League batsman Shoaib Shaikh steadied the side.
Davies showed tremendous patience in making 10 from 54 balls, but when he was dismissed the Phoenix lost 3-2.
Losing wickets in clumps was a constant, with last season's wooden spooners also losing 2-1 and 3-1.
Shaikh top-scored with 27 from 55 balls.
"It was a tricky deck to bat on, especially early, the ball was sticking in the wicket a bit and the spinners were gripping it, the ball was turning at right angles," McMillan said.
The 20-year-old snared 5-16 from eight overs.
"I got it off my last ball, it was a shocking ball actually, it was a full toss that he hit straight back to me," he said.
He also captured 5-8 against East Albury in a T20 game last season.
Opening bowler David Perkins also nabbed his best figures with 3-21 after debuting last season.
"He's come on in leaps and bounds during the off-season, he was fired up and bowling really well," McMillan praised.
The wicket was easier to bat on for the Eagles, although Shaikh took 2-23 with his leg-spin.
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That was the first match for both clubs as New City had the first round bye, while Belvoir's match was washed out.
The Eagles are away to Wodonga Raiders in round three, while New City meets neighbours Lavington, which is coming off the bye.