The Dallas defender was the ice giant in the semifinals against the United States and scored one goal and two assists.
Now he hopes to lead Finland to the country's fourth World Cup gold ever.
The previous three came in 1995, 2011 and 2019.
The team has already secured a historic medal because in eight previous home World Cups it has best placed as four.
- It feels fantastic.
Our goal was to take us to the final and win the gold.
Now it's important that we are ready for it.
It is magical to play in front of these home fans and it will be crazy to play the final in front of them, says 22-year-old Heiskanen.
Fourth straight championship final
At the same time as Tre Kronor has had some difficult years behind it, Finnish ice hockey has flourished and this is the country's fourth straight championship final after the World Cup gold in 2019, the World Cup silver in 2021 and the Olympic gold in February.
Why is Finnish ice hockey so good right now?
- We play together as a team all the time and everyone believes in our game system.
Everyone does the right things all the time and that is why we have been so good in recent years, says Heiskanen.
Sakari Manninen, shared first in the internal points league with nine World Cup points, on the same question:
- I think we do a good job in the Finnish league at the same time as everyone thinks it is an honor to stand up for the national team.
We have a brand new arena here in Tampere and the fans are absolutely fantastic to play for.
Javascript is disabled
Javascript must be turned on to play video
Read more about browser support
The browser is not supported
SVT does not support playback in your browser.
We therefore recommend that you switch to a different browser.
Read more about browser support
Finland is ready for the World Cup final - knocked out the USA.
Photo: Bildbyrån / TT Nyhetsbyrån
"What Finland does works"
Can Swedish ice hockey learn anything from you?
- Haha, I do not know if I would see it that way, but it feels like what Finland is doing right now works.
But Sweden is always a skilled and strong team that is difficult to face.
The World Cup final between Finland and Canada starts tonight at 19.20 Swedish time.
It is played in Tampere in the newly built Nokia Arena, which was inaugurated in December.
SEE ALSO: SVT Sport has visited "The Home of Hockey"
Javascript is disabled
Javascript must be turned on to play video
Read more about browser support
The browser is not supported
SVT does not support playback in your browser.
We therefore recommend that you switch to a different browser.
Read more about browser support
Finnish hockey is feeling very well at the moment and perhaps the best is perhaps in Tampere.
Photo: SVT / TT