Benjamin Sesko warned premieres.
The £ 74 million bait cut off Newcastle to seal a move to Old Trafford on Saturday.
Forward Sesko believes that Ruben Amorim and his Red Devils have recently been aware again after a few difficult times – and could not resist the chance to be part of it.
When asked about his ambitions at United, Sesko said: “We get better, connect, we grow step by step.
“We are getting more complete and it's just a matter of time before we fly high again.”
Toon also offered the asking price of RB Leipzig and the Slovenia international had the opportunity to choose between the two clubs.
He was asked why he chose to join the men of Amorim and said: “First of all, it is because of the club – it is a historic club and an incredible one.
“The team is great and it gets better and better. It gives you an energy that you want to be part of. A great project and I can't wait to start.
“Of course the manager also played a role – that is important in football.
“He is a great guy, a great coach. I think it will be exciting.”
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Sesko's football idol is a former United Striker Zlatan Ibrahimovic and he has been a forensic clips of the Swedish legend for many years.
Ibra had one memorable season in Old Trafford before he sustained a serious injury in the spring of 2017 – but the new boy will be in the clouds if he can have such an immediate impact.
Sesko said: “Since I was small, I have watched him. Every YouTube video that I can find. Because he is just great for me.
“We don't have the same character, but I like him – the way he plays, the way he enjoys football. In general he is my idol.
“I try to take some things away from him, there are some similarities with the high stairs and things and the powerful strikes.
“We are not the same – we have different playing styles, but in every situation I will try to do the way he did.”