Un De Sceaux has won all six career starts, two in France and four since switching to Ireland, and has emerged as the dark horse for this season's Stan James Champion Hurdle at Cheltenham in March.
The six-year-old has been brought along steadily by Willie Mullins but is set to be stepped up in grade after demolishing three-runner fields on his last two starts by a combined total of 82 lengths.
Ruby Walsh has been on board for all four starts for Mullins but has revealed that he has no idea how far the son of Denham Red can go.
"I must mention Un De Sceaux, who was again so impressive when winning in a canter at Navan last Sunday. What I love about this horse is the way he behaves in the middle of a race," he wrote in his column in the Irish Examiner.
"He just sustains a relentless gallop and then is able to keep it up it right to the line. Truth to tell, I just don't have a clue as to how good he is.
"How far can he go, I just don't know. But here's the thing, I'm of the opinion Un De Sceaux will manage to stay any trip."
Whether the last line is a reference to alternative Festival targets is anyone's guess with Mullins having an embarrassment of riches with Hurricane Fly and Annie Power as possible contenders for the two mile blue riband event but the bookmakers are certainly taking Un De Sceaux seriously and he is a general 12/1 chance for Festival glory.