Mount Mews ran out an effortless winner of the totescoop6 Premier Kelso Novices' Hurdle under Brian Hughes.
Malcolm Jefferson's six-year-old won bumpers at Market Rasen and Kelso last spring and returned to the Borders venue to make a successful debut over obstacles in December.
He suffered an odds-on reverse on his next start at Wetherby, but righted that wrong in style at Doncaster and he was the 11/8 favourite to complete a course hat-trick at Grade Two level.
With Mirsaale a non-runner, just four runners went to post and only two finished.
Capitaine was the first to drop away and was eventually pulled up, leaving Mount Mews and Chalonnial to track the pacesetting Fairlee Grey into the home straight.
Mount Mews and Chalonnial moved on to fight it out, but it was a short-lived battle as Jefferson's charge moved comfortably clear under a confident Brian Hughes.
He skipped over the final flight and passed the post 49 lengths clear of an extremely weary Chalonnial.
Fairlee Grey fell at the final flight, but eventually got to his feet.
Jefferson said: "He was very impressive and kept galloping.
"He handled the ground. I think the rain that came overnight was a big help as made it loose. A lot of horses go through that better than when it's sticky.
"All being well, he'll go to Aintree now for the two-mile novice hurdle we won with Cyrus Darius a couple of years ago (Top Novices' Hurdle). It was a Grade Two then, but it's a Grade One now.
"He has plenty of toe and they'll go a good gallop, which will suit him."