Ill-discipline from the Swifts defenders gave Harten a clear shot at goal, and with time up on the clock, the English shooter nailed the attempt from under the post.
Despite being largely written off for this finals campaign after their dreadful run into the playoffs - indeed few even expected them to get this far following the key departures of Irene van Dyk and Laura Langman in the off-season - Magic captain Casey Kopua said her side were always confident they could be competitive in the finals series. The star defender said her side refused to give up against the Swifts, and those fighting qualities paid off for them down the stretch.
"I think it just goes to show the heart, the power and the belief we have in this team," said Kopua, who is the only player to have featured in all seven of the Magic's playoffs campaigns.
"In our trainings we set up scenarios for these pressure situations. Under pressure you can see in each others eyes how things should be going. Obviously it was a bit tighter than we would have liked, but it was great, can't wait for the next one."
The Waikato-Bay of Plenty side will now face the loser of tomorrow night's major semifinal between the Melbourne Vixens and Queensland Firebirds in the preliminary final next weekend.
Rejecting the unwritten sporting convention that dictates players decline to nominate a team they would rather face in their next playoff encounter, Kopua was typically honest when asked whether she would prefer to head Melbourne or Brisbane for their next sudden death encounter.
"Melbourne," she laughed.
Tonight's win was reminiscent of their one-goal win over the Adelaide Thunderbirds in the 2012 minor semifinal, which kick-started the Magic's stunning title run under the stewardship of then-coach Noeline Taurua.