The Blues take on Welsh regional rivals the Ospreys at the national stadium in this vital fixture, with the winning team heading to Twickenham for the final against either Leicester Tigers or Sale Sharks.

You could be the lucky mascot that leads the Blues to victory and on to the final. This is a once in a life time opportunity.

As well as leading the team out onto the hallowed turf and having your photograph taken with the Cardiff Blues captain, you will be given a brand new Blues jersey which you will be able to wear as you march down the tunnel with the captain.

You will also receive four tickets for you and your family to see both semi-final games. Do you think that you could be the Blues lucky charm?

To enter, send an e-mail to: bruiser@cardiffblues.com with the correct answer to the following question, including your name, age, school, day time telephone number, hobbies and favourite Blues player.

Which team have Cardiff Blues not played at the Millennium Stadium before?

A) Leicester Tigers
B) Leinster
C) Ospreys

You can also enter via cardiffblues.com/competition or by sending your postcards to Mascot Competition, Cardiff Blues, Cardiff Arms Park, Westgate Street, Cardiff, CF10 1JA.

Competition entries must be in by Wednesday, March 7, and is open to Blues supporters aged from eight-16 years of age. The prize is non-transferable.