Jonjo O'Neill repeated last year's Pertemps Final success as Creon (50-1) swooped late to snatch the spoils in the closing race.
Half a dozen horses were in with a shout jumping the final flight and it looked at one stage as if G V A Ireland, who had raced in the leading pack throughout, would hang on.
But Timmy Murphy conjured a great burst from the JP McManus-owned nine-year-old and they prevailed by half a length.
Alexanderthegreat was a length back in third, with His Nibs in fourth.
The Morris-trained favourite Keepatem (4-1) was one of those in with a real chance at the last after travelling well, but could not find any more for David Casey.