Idun was selected by the
Greater Western Sydney Giants at pick No. 61 in the
2018 AFL national draft. He made his senior debut against
Sydney in round 20 of the 2019 season, as a late replacement for injured forward
Jeremy Cameron. He only managed three games across his first two years before being selected in round one, 2021 and going on to play 21 out of a possible 22 games, averaging 5.4 marks and 12.6 disposals per game. He was named the NAB AFL Rising Star nomination for round 23 of the 2021 season. ==Statistics==