Nicky Law claimed Rangers were too big to turn down after choosing an Irn-Bru Second Division title challenge ahead of a move to the npower Championship.

Law today signed a three-year contract with Rangers that will begin on September 1, when the Third Division champions' transfer embargo expires, having already told Motherwell of his intention to leave Fir Park.

The 25-year-old had talks with several English clubs but the lure of Ibrox and the enthusiasm of manager Ally McCoist proved too strong.

The former Sheffield United and Rotherham midfielder declared himself "delighted and honoured to sign for this great football club" as he was unveiled at Ibrox.

And he added: "It was impossible for me to turn down. It was probably a once-in-a-lifetime offer for me to sign here.

"If you say no to it, you are probably not going to get that opportunity again.

"When I spoke to him (McCoist), I didn't think I could ever really say no to it.

"Playing here at Ibrox in front of fantastic crowds, and this crowd is fantastic and the attendances here last season for Third Division football were unbelievable, that was a huge draw for me as well."

Law rejected accusations that leaving the Clydesdale Bank Premier League runners-up and Europa League qualifiers for third-tier football was purely a financial decision.

"People will probably say that I've come here for the money and there's no ambition, but certainly not," said Law, who scored 13 goals in two seasons at Fir Park.

"I could have probably gone down south and done better (financially) than I have coming here but for me it's not about that and it never has been.

"It's always been about the football for me and playing for this football club was impossible to turn down because it's a fantastic place.

"When you come here to the ground and the training ground and you see how big it is and the history here...

"I am ambitious and I want to win titles. You only have to walk out the tunnel and look at the other side of the stadium and you see how many they have won. It's in the DNA here.

"When you think of Rangers, you think of titles and trophies.

"I want to be part of that and I'll do everything to do my bit."

Law added: "Obviously I'd love to be in the SPL with Rangers but the circumstances are it's Division Two.

"But for me it was always just playing for Rangers whatever the level.

"It's a huge opportunity for me to play with one of Europe's biggest football clubs. It was too big a draw for me to turn down.

"The manager's determination to bring me in as well was quite flattering because he desperately wanted to bring me to this football club.

"That was a huge thing for me as well so he had a big part to play and I'm desperately looking forward to working with him as well."

Law made his Sheffield United debut in the Premiership as a teenager but had just had a season in League Two when he signed for Motherwell. And he admitted playing in the Championship again was a lure.

"It would have been easy for me to do that because I could have gone home and nearer my family," he said.

"But I've had a great time in Scotland - two great years at Motherwell, successful years as well. I was quite settled in Scotland.

"But it was just too big for me to turn down. This was the biggest club that I could have signed for. It was as simple as that, really."

Law also feels it is inevitable Sheffield United target Stuart McCall will move on to bigger things in his managerial career following his achievements at Fir Park.

McCall could soon follow Law out of the door after holding talks with the Blades over their vacant managerial role this week.

Law came through the ranks at Bramall Lane when McCall was a player/coach and then assistant to manager Neil Warnock. He then signed for McCall twice, on loan at Bradford and at Motherwell in 2011.

Motherwell secured third and second in the Clydesdale Bank Premier League and played in the Champions League qualifiers in the ensuing two years and Law is not surprised that the npower League One side have earmarked McCall as a candidate to replace Danny Wilson.

"I'm certainly not and particularly at Sheffield United with the ties he has there," said Law as he was unveiled as a Rangers player today.

"With Stuart, wherever he goes, he seems to leave there as a legend.

"He was only at Sheffield United as a player for two or three seasons but I was there with him and he is really loved by everybody at that football club, and the fans as well.

"I'm not too sure about the situation. From Motherwell's perspective it would be a massive blow to lose Stuart McCall.

"He's the manager of the year in the SPL and everyone can see what a fantastic job he has done there. To be the best of the rest two years on the spin is a fantastic achievement.

"People have praised us as players at Motherwell and given them a lot of plaudits, and rightly so because we have got some good players there.

"But I can tell you he is a massive part of that and is probably the biggest part of it.

"He's a fantastic manager and I'm sure he is going to go on to bigger and better things.

"Unfortunately for Motherwell at some point they will lose him. Whether that's now I don't know but I would have thought at some point they will."

The 25-year-old, who scored 13 goals in 86 goals for Motherwell, added: "For me he has been absolutely brilliant. You all know what I think of him.

"I had a conversation with him this morning and he wished me all the best here and said it was a fantastic opportunity and that I would love it.

"As well as a great manager, he is a great man as well. he has been fantastic with me and I will always stay in touch with him. I can't speak highly enough of him."

Rangers have also confirmed the signing of Dundee United striker Jon Daly.

The Irishman will sign a two-year contract for the Irn-Bru Third Division champions on September 1, when their transfer embargo expires.

Daly, who had confirmed his intention to sign for Rangers on Sunday, follows Kilmarnock goalkeeper Cammy Bell and Motherwell midfielder Nicky Law in joining the Ibrox side this week.

The 30-year-old was out of contract at Tannadice and had captained the club this season.

Daly, who has also played centre-back for United, scored 72 goals in 203 appearances after signing from Hartlepool in January 2007.