My Murphy repelled the late challenge of Mala Beach to land the Goffs Thyestes Chase at Gowran Park.
Robbie Power had his mount - who was second to subsequent Gold Cup runner-up Djakadam 12 months ago - prominent throughout the final circuit, serving it up to Ballycasey from some distance out in the three-mile-one-furlong event.
He had that rival beaten coming to the penultimate obstacle but Davy Russell was just getting 5-1 favourite Mala Beach to hit top gear.
However, the Liam Burke-trained 16-1 winner dug deep for Power on the run to the last and after the pair were neck and neck over it, My Murphy just hung on for a length-and-a-quarter success.
Ucello Conti appeared to be in with a shout after Jacques Ricou steered a wide course throughout, but a mistake at the second-last saw him drop back for third. The Job Is Right was fourth.