Trafford Lad earned a quote of 16-1 for the Royal & SunAlliance Chase at the Cheltenham Festival following an impressive Grade Three victory at Punchestown.
Blue Square cut Dusty Sheehy's six-year-old from 25s after he recovered from a mid-race mistake to land the A Space Cabins Florida Pearl Novice Chase by four lengths from Window Of Hope.
Trafford Lad stayed on well after taking it up two fences from home, with Siegemaster, the 9-10 favourite, finishing third after a bad blunder five from home.
Sheehy, whose charge is still unbeaten over fences, is now set to step up to Grade One company for the Bar-One Racing Drinmore Novice Chase at Fairyhouse on November 30.
"Nothing went according to plan - they didn't go fast enough," said Sheehy.
"The horse ran too free and ended up in front.
"The plan had been to hold him up until the last minute, but he won in the end.
"He'll next head for the Drinmore and he'll be a much-better horse in a truer-run race."