Foildubh denied French import Rubi Ball a debut win for Willie Mullins when edging out the hot favourite in the Rock of Cashel Hurdle at Thurles.
Rubi Ball had been a prolific winner in France and was expected to get off the mark at the first time of asking for the champion trainer but the eight-year-old had to settle for second spot.
After making the early running, Rubi Ball was overtaken with more than a circuit of the track left by Foildubh (7-2) as Paul Carberry took charge on John Ryan's consistent nine-year-old.
Ruby Walsh brought Rubi Ball to challenge from the third-last flight but the 1-2 shot could not get past the long-time leader despite a late flourish.
Mullins was not despondent after the reverse, saying: "It appears he'd be better going left-handed. He probably found the ground too good. All his best form was on heavy ground and he doesn't seem to have too much respect for the hurdles.
"At least he ran a race and it's something to work on."
Foildubh could now be headed for the Lexus Chase at Leopardstown over Christmas, although Carberry's availability is seen as crucial.
Ryan said: "He's definitely a much better horse this year and is stronger.
"He missed the last two fences in Clonmel the last day. We'll probably go for the Lexus next, but it all depends if we can get Paul Carberry. The horse will go wherever we can get him to ride.
"The step up to three miles in the Lexus would be no problem. He's got loads of stamina."
Mullins had better luck when Lucky Bridle banished a miserable jumping debut to the memory with a clear-cut success in the Cahir Maiden Hurdle.
Mullins' French recruit suffered all sorts of problems at Punchestown last month but, with a hood applied here, Walsh was keen to avoid any such issues by setting the even-money market leader off in front and he didn't see another rival, passing the post three and three-quarter lengths ahead of Shield.
Letter Of Credit (13-2) claimed the scalp of the odds-on Make A Track in the Glen Chase.
In a four-runner race, the favourite's task should have been made easier when Canaly came down three out, with Tinakellylad also blundering at the same obstacle, but Phillip Enright avoided the trouble in behind and brought Letter Of Credit to challenge at the last, and he proved half a length stronger on the run-in.
Sitcom broke her duck over fences in the Killinan Beginners Chase.
Il Fenomeno headed the market at 5-4 and was given every chance by Paul Carberry, but he was under pressure from the home turn and faded into fifth, as Sitcom improved to touch down over the last in front en route to a length-and-a-half defeat of Kilcarry Bridge.
Baily Dusk and The Blarney Rose came to the final fence in the www.thurlesraces.ie Handicap Chase locked together, but The Blarney Rose took a heavy fall, leaving her rival clear to coast home by eight lengths as the 13-8 favourite.
Sea Light took the Horse & Jockey Handicap Hurdle, while Oscar Chimes proved too strong in the Holycross Maiden Hurdle.