Kolora-Noorat is likely to be without a key player for its preliminary final on Saturday.
Playing coach Ben Walsh said ruckman Brad Lucas hurt his shoulder in the second quarter of his team's shock loss to Nirranda.
The Blues, which have progressed to the grand final, came from behind at the three-quarter time to take a thrilling 8.10 (58) to 6.9 (45) victory in Saturday's second semi-final.
"He'll probably be unlikely for next weekend," Walsh said of Lucas.
The youngster, who has played 16 matches this season, came off early in the second term and didn't take any further part in the game.
Walsh said big man Brodie Edge rucked the rest of the match.
The positive for the Power is that Luke Tebble, who has also put in 16 matches this season, is likely to return from a minor hamstring injury for the preliminary final.
Walsh said his team, which finished on top of the ladder, had some work to do.
"We got outplayed, when it came to the crunch late in the game and when it was a 50-50 battle, Nirranda were too good," he said.
"They were too good around the footy, they probably adapted to the conditions a little bit quicker than us."
"When the heat was really on, we weren't quite up to it today."
The Power mentor said the beauty of finishing first on the ladder was that his team had another chance.
"We've just got to make sure we're better, use this week really productively and learn from today and reload and have another go next week," he said.
Walsh said his charges were beaten around the ball.
"We'll just keep working on that contested ball stuff and that work-rate, which we probably got beaten at today," he said.
"We won't be doing anything new, just revisiting things we think are important this time of year."
It was a tough day for the Power but an exhilarating one for the Blues.
Nirranda centre half-back Mathew Lloyd said it was a good buzz to make another grand final.
"It's a pretty good feeling really," he said.
"We've just got to really enjoy these next two weeks leading up to it and make sure we're right to go for the big one."
The 2018 premiership player said midfielder Isaac Templeton had given the side a big boost since returning from injury and suspension.
Templeton, who didn't play between round three and 18, was named the Blues' best player against Kolora-Noorat.
Lloyd, who was named second best for the Blues, said Templeton was having a significant impact.
"Yeah, it's huge," he said.
"Having 'Tempy' on the field is just huge for leadership, he just gives you a bit of grunt and a bit voice and gets everyone up and about."
Templeton was also named second best in his team's qualifying final win over Merrivale.
Lloyd said the Power match was a classic finals footy encounter.
"It was a good contest, we knew they were going to come out hard," he said.
The Blues, which trailed by 14 points at three-quarter-time, stole the game in the final stanza.
Half-forward Ben Threlfall kicked an incredible snap goal to have the Blues down by a point.
Then Jesse Dalton followed up with an accurate set shot to put them ahead.
Lloyd said the Blues were building in the third term.
"At three-quarter-time, we knew we were a chance there with the wind," he said.
We've just got to really enjoy these next two weeks leading up to it and make sure we're right to go for the big one.Mathew Lloyd
"We were never going to give up, it took a bit of fight and we ended up getting there."
The Blues also came from behind against Merrivale last week.
Co-coach Shane Threlfall said it was a great effort to do it two weeks in a row.
"I take my hat off to the players, they were fantastic again today," he said.
Like Lloyd, Threlfall said his team played a good third term.
"We really started to get control of the game, we were really hard at the footy," he said.
Nirranda lost to Kolora-Noorat in round 16 and Merrivale in round 17.
Threlfall said his side learnt from those matches.
"We were able to tweak a few things with our game," he said.
"And fortunately in the finals our players have really taken on board what we've tried to get them to do."
The atmosphere was electric in the Blues' rooms after the game.
Threlfall said the win meant a lot.
"We've just got a really good bunch of supporters from our community," he said.
"We've got to understand that for 20 years, our community didn't have a team in the finals.
"So they've got really excited in the past three years and this is our fourth year in finals."
Threlfall has a selection headache coming up with dangerous small forward Aaron Searle eager to return to the senior side from a calf injury.
Threlfall said Searle, who had missed a month of football, got through his return game in the reserves on Saturday.
The Blues wanted to see if he could get through a game before bringing him back to the top team.
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