Wales Under-21s showed their senior side the way by completing the Grand Slam with a 32-5 victory over their Irish counterparts in front of a crowd of more than 7,000 at The Gnoll.
Ospreys fly-half Matthew Jones, playing on his home ground, claimed 17 points as Wales sealed their third full house of victories at this level since 1999. Tomorrow at the Millennium Stadium, Mike Ruddock's men will look to match their feat.
Ireland's youngsters had won just one match in this year's tournament, but for the opening half at least they caused a confident home side plenty of problems.
But 17 points in 10 minutes straight after the break set up the win for Wales and James Merriman's side now follow the successful Dragons teams of 1999 and 2003.
Wales opened the scoring after just three minutes when Jones landed a penalty from 25 yards.
And with the home side dominating possession and territory, there was an inevitability about the first try on 16 minutes claimed by the Ospreys number 10.
Newport full-back Ricky Williams sparked the move from his own 22 and great work by centre Andrew Bishop and then scrum-half James Ireland opened up the way for Jones to race home from 30 yards.
Wales had played all the rugby in the opening quarter, but the try appeared to be the signal for Ireland's wake-up call and they responded impressively.
Flanker Oisin Hennessy was denied by a superb last-ditch tackle from Wales blindside Chris Davies a yard out, then lively Ballymena centre Andrew Trimble broke clear to put number eight Stephen Ferris over in the corner.
Skipper David Steenson missed with the conversion, but Ireland were well in the match at 10-5 at half-time.
However, after the 10 minutes that followed the restart the game was all but over.
Cardiff wing Chris Czekaj crossed in the corner following slick hands by the home three-quarters, then a second Jones penalty and a breakout try by Bishop pushed Wales into a 27-5 lead.
Ireland had replacement lock Mark Melbourne red-carded before Wales completed victory with a second try by Czekaj two minutes from time.