The Magic switched up their defensive end with Georgia Tong earning the start at goal keeper, Erena Mikaere pushed further up to goal defence and Holly Fowler on the wing.
It was the Magic who were quick out of the blocks, scoring five straight goals for a 5-1 lead as goal attack Abigail Latu-Meafou took the lead in the shooting circle landing all but one of her nine first-quarter attempts.
The Steel pegged back the difference through the efforts of experienced midcourters Shannon Saunders and Gina Crampton, with the southerners trailing 9-10 at the first break.
The southerners struggled to find their rhythm up front as they continued to bed in the new attacking line, but their trademark patience with ball in hand was key in getting the ball to McCollin, who was the dominant scorer.
Nothing separated the two teams at halftime, the scores locked at 20-20.
With just under six minutes left in the third quarter, the Steel introduced Halpenny into the 2020 ANZ Premiership while, at the other end of the court, the Magic turned to the bench again with Khiarna Williams replacing McPhee.
The Steel opened up their biggest buffer of the match to go into the fourth quarter with a 31-27 advantage and they injected fresh legs through Kendall Corkery, who came on at wing defence.
But it was the Magic who came out with a spring in their step as they closed the gap to just one goal, Williams settling well in the shooting circle and growing in confidence.
The Steel, however, used all of their experience through the middle, along with the netball nous from Halpenny, to slowly regain their ascendancy for a five-goal buffer.
Magic coach Amigene Metcalfe was not done with the changes heading into the last five minutes of play, with Jenna O'Sullivan coming on for Fowler in defence, enough to spark her side for one last assault on the scoreboard.
They again pulled the Steel to within one but were unable to make a vital turnover on the southerners' final centre pass, netting the bonus point in the one-goal loss.
