Holtz has been successful with Djurgården this fall, 13 points (6 + 7) in 19 games, and is drafted by the New Jersey Devils.
Mats Sundin started his NHL journey 30 years ago, from Djurgården he too, and is impressed by what Holtz has achieved.
- What strikes me is that he has such an understanding of the game, which the best players have even though he is so young.
That is, he takes positions on the ice and reads the game well.
Something that is unique to his age is that he has a very nice shot, says Sundin.
Shot the garage door
Holtz has a shotgun on the garage driveway to his parents' villa, where he has stood and worn against a target with marked surfaces to increase precision.
Behind the net is a shattered garage door.
When Holtz shows off his huge prize locker in the boys' room, he points to a special gold medal.
- The biggest is the U18 World Cup gold.
We came together as a group and won even though the USA had the best team, which everyone knew, says Holtz about the surprising title at home in Örnsköldsvik / Umeå in the spring of 2019.
Something similar is needed in this championship if the success is to be repeated.
- We can not expect a semi-final place.
There are three teams that look extremely strong;
USA, Canada and Russia, says expert Jonas Andersson.