Kemboy catapulted himself into the Cheltenham Gold Cup picture with a dominant display in the Savills Chase at Leopardstown.
David Mullins made a bold move after only a mile to sweep around the field and take up the running and the six-year-old relished being out in front.
Trained by Willie Mullins, Kemboy was stepping up in class and trip having won the Clonmel Oil Chase on his reappearance, after which he was supposed to contest the Ladbrokes Trophy at Newbury.
Bad weather prevented him from making the journey to Berkshire at the 11th hour, but his enthusiastic owners of the Supreme Racing Club gained more than adequate compensation.
Monalee kept him company on the front end as Outlander dropped away, but approaching the second last most of his rivals were being ridden, including last year's winner and favourite Road To Respect, who slipped badly and nearly came down on the final bend.
A big leap at the last sealed the deal and Kemboy (8-1) powered seven and a half lengths clear of Monalee, with Road To Respect running on well in the circumstances for third.
Paddy Power slashed the winner to 10-1 from 50s for the Gold Cup.
David Mullins said: "We were going very, very slow and even when I hit the front with a lap to go, we were still going slow.
"Everything went to plan really except we had to just let him go, nobody took me on. He jumped well and there is still plenty to improve on I think.
"He could be a proper horse."