Sanus Per Aquam got the better of Lieutenant General in a terrific tussle for the Barronstown Stud EBF (Colts & Geldings) Maiden at the Curragh.
Donnacha O'Brien looked like he had made a winning move on the newcomer, trained by his father Aidan, but Kevin Manning plugged away on Jim Bolger's fellow debutant Sanus Per Aquam (7-1).
The son of Teofilo asserted close home to win by a length and a quarter. Leath Na Hoibre was third.
"He's a big raw two-year-old and has the physique to progress well," said Bolger of the winner who is a full-brother to the year-older Morning Mix, who was successful at the meeting on Friday.
"He could come back here for the Futurity and possibly the National Stakes after that.
"If I was a proper trainer you wouldn't see him next until a Derby trial!"
The race was won last year by subsequent dual Guineas hero Gleneagles.
BoyleSports introduced Sanus Per Aquam at 33-1 for the Investec Derby, while RaceBets offered an introductory quote of 25-1 for the Qipco 2000 Guineas.
Ryan Moore made all the running on Air Pilot as the Ralph Beckett-trained six-year-old landed his first Group Three success in the Hermitage Medical Clinic International Stakes.
Air Pilot (8-15 favourite) enjoyed an easy lead and had enough in the tank to comfortably see off the attentions of Parish Hall, representing the opening-race winning team of Bolger and Manning.
Roheryn was some way behind as last of the three runners.