On 19 July 2006 Magners Irish Cider are unveiled as the first ever tournament sponsors. The new Magners League begins on 1 September, the table decided without the additional points for the free weekend.

The league attendance record is raised twice more, culminating in a 48,000 sell-out for the "Last Stand" final game at the old Lansdowne Road on New Year's Eve 2006 where Leinster beat Ulster 20-12.

The Ospreys take their second league title and the inaugural Magners one on 12 May 2007 on the final day of the season courtesy of a 24-16 win over Border Reivers at Netherdale after both Leinster and Cardiff Blues had come up just short with their challenge.