The 26-year-old was a key player in the Terriers' incredible season, where they defied expectations to reach the top tier for the first time in 45 years by winning the Sky Bet Championship play-off final against Reading.
Chairman Dean Hoyle admitted he took a punt on the recommendation of an agent when hiring Wagner and it has turned out to be an inspired one. Those sentiments were echoed by Mooy in the immediate aftermath of the Terriers' Championship play-off final win over Reading on Monday, with the influential play-maker unwilling to pledge his future anywhere.
Wagner is expected to discuss his transfer budget with the chairman today and retention of players now on loan is at the top of his wishlist, although he will face competition for Mooy. I feel bad for them.
He imposes a similar high energy, high pressing game to that which has brought Liverpool and Huddersfield Town such success and this can only add optimism ahead of Norwich's promotion push next season.
Sunderland, Middlesborough and Hull City are the unlucky teams to go down, with all relegated for next season.
That explains why the match played for 120 minutes with a 0-0 score line and was only decided through penalty shoot outs.
Centre-back Liam Moore missed the chance to make it 4-2, blazing over the crossbar, before Jordan Obita had his effort saved by Danny Ward at 3-3.
"He presented us with them before the semi-final against Sheffield Wednesday, and I've been wearing this for two weeks now".
"What we have achieved this season is great".
"But today has proved with an open mind it can be achieved, though I never thought it would be possible".
Habsi thanked his fans in United Kingdom and Oman and said, "To all our dear fans and supporters, I thank you from the bottom of my heart for being with us throughout the season. We need to give it another shot next season". But what we've got to remember is how we've got here.
"We told our players all the way through they would have to come out of their comfort zone", Wagner said.