Lunar Display recovered from a bad mistake at the second-last flight to win the Listed BetVictor Irish EBF Boreen Belle Mares Novice Hurdle at Thurles.
The Joseph O'Brien-trained five-year-old looked to have lost all chance at that point but was back on an even keel for JJ Slevin in a matter of strides.
Challenging for the lead at the final obstacle, 5-2 shot Lunar Display emerged through the fog in front and drew away to take the contest by a length and a quarter from Getaway Star.
Slevin said: "The fast-run two miles played to her advantage and while she was only barely on the bridle, they went quick enough in front of her.
"It took me a while to learn how to ride her and I think I have been putting her in motion a bit soon, especially the last day when I put her in a dog fight and she was outbattled.
"We are learning about her all the time, she is a grand mare and she won easy today. She is very consistent and Joseph does a very good job with those types of mares."
Dorans Weir (4-1) revived memories of the great Dorans Pride when opening her account in the Irish Stallion Farms EBF Mares INH Flat Race.
Wearing the famous green and red colours of owner Tom Doran, Dorans Weir had shown promise on her racecourse bow over hurdles on this course last month.
The five-year-old travelled smoothly for amateur Pat Taaffe before cruising into the lead over a furlong out and striding clear to beat Burn The Evidence by three and a quarter lengths.
Division Two was won in impressive fashion by Eabha Grace (5-6F) on her debut to complete a double for Willie Mullins.
Jody Townend's mount led over a furlong out and powered away to score by six and a half lengths from Scarlet Witch.
Stratum (2-5F) imitated the brace when getting off the mark over fences at the second attempt when leading home a one-two for Mullins in the BetVictor Irish EBF Beginners Chase.
The favourite was handed the lead when Skol came down at the fourth-last fence, but was challenged hard by his stablemate and had to be driven out by Paul Townend to score by a length.
This was the 10th success of Stratum's career after four on the Flat in Britain, including the Cesarewitch and Queen Alexandra Stakes and three Irish hurdle races.
Mighty Tom (8-1) shrugged off a seven-month absence when making all the running to take the Happy Christmas To All Handicap Hurdle.
The six-year-old, trained by Tom Cooper and ridden by his son, Bryan, pulled away from favourite Mind Your Money to score by six lengths.
Western Sea (4-1) outstayed market leader Ricky Langford to take the Adare Manor Opportunity Handicap Chase.
Ross O’Sullivan’s charge, ridden by Shane O’Callaghan, was headed approaching the last but rallied in game fashion to get the verdict by three-quarters of a length.
Gordon Elliott got on the scoresheet with Mr Fred Rogers (EvsF) in the Horse & Jockey Hotel Rated Novice Hurdle, while Rodger Sweeney’s Shane Says (18-1) nabbed Presenting Point on the line to land the Molony Cup Handicap Chase.
