Winger Rudi Wulf snatched a late try to help the Blues seal a dour 27-18 Super 14 win over the Brisbane Reds in driving rain at Ballymore.
With the Blues protecting a 20-18 lead and staving off fierce drives in the closing stages, the four-test All Black ducked a desperate lunge from a defender to plunge the ball in the left-hand corner at the end of a chain of passes.
Debutante Lachie Munro coolly slotted the conversion to seal the Blues second win of the season and break the Reds' hearts on their return to Ballymore after five years.
Despite being largely smashed in the rucks and the mauls, the Reds carried the early momentum when halfback Will Genia intercepted an errant chip kick from Blues first five Stephen Brett to prance across the line in the second minute.
Quade Cooper converted the try and a penalty shortly to make it a 10-nil lead as Brett missed two early scoring kicks.
Blues outside centre Rene Ranger barrelled his way through heavy traffic to bring up the Blues first try, before lock Anthony Boric burrowed over the line from the back of the ruck shortly after half-time to level the score at 13-13.
Brett converted to give the Blues the lead which they grimly held on to for the rest of the match, while halfback Alby Mathewson made it 20-13 after the 52nd minute when he sliced through the back row for a try after taking the ball from the lineout.