LEXINGTON, Ky. – Champion Monomoy Girl wrote herself into the history books with her trip through the auction ring Sunday night at the Fasig-Tipton Kentucky fall selected mixed sale and will continue to write herself into the history books on the racetrack. The mare was purchased by Spendthrift Farm for $9.5 million and will remain in training with Brad Cox for another campaign in 2021. "She's a superstar, she's an all-timer," Spendthrift general manager Ned Toffey said. "She'll go back to Brad Cox, and that's the plan right now – we'll let her decide, but as long as everything stays the same. She appears to be very sound, the vet checked her out, everything looks good. She'll go back in training another year, and then we've got a stallion or two that might suit." Monomoy Girl was consigned by the Elite Sales of business partners Bradley Weisbord and Liz Crow, as agent for the ownership partnership of Michael Dubb, Monomoy Stables, Stuart Grant's The Elkstone Group, and Bethlehem Stables. The 5-year-old Tapizar mare's price tied her for second all-time among racing or broodmare prospects sold at public auction in North America. The record-holder is Horse of the Year Havre de Grace, sold for $10 million in 2012, followed by two-time Eclipse Award champion Songbird, sold for $9.5 million in 2017. Both of those mares were purchased at Fasig-Tipton November sales by Mandy Pope's Whisper Hill Farm. Monomoy Girl won Saturday's Breeders' Cup Distaff to remain unbeaten this season; overall, she has won 13 of 15 starts, has never finished worse than second, and has earned more than $4.4 million. She won the 2018 Kentucky Oaks and Breeders' Cup Distaff in an Eclipse Award championship campaign and is virtually certain of another divisional title after winning the Distaff. For Crow, who scouted Monomoy Girl as a yearling and purchased her for just $100,000 at the Keeneland September yearling sale, watching the mare score a second Distaff and then reach the heights in the auction ring just 24 hours later was an emotional experience. "I'm just really proud of her," Crow said. "It's been a really emotional day. It's been really hard to not know what's going to happen going up to the ring. You just want her to go to the right hands, and I'm really excited that they got her." Monomoy Girl was part of an active night for owner B. Wayne Hughes's Spendthrift Farm, which also had purchased Grade 1 winner She's a Julie for $3 million, multiple Grade 1 winner Got Stormy for $2.7 million, and the broodmare prospect Mother Mother for $1.8 million midway through the sale. "Just thought it would be a good time to add some quality to the top end of our broodmare band," Toffey said. Many of those mares will go to support Spendthrift stallions. The farm previously announced a roster of 21 stallions for its Kentucky farm for 2021, topped by the nation's leading sire, Into Mischief. First, though, the farm could have an active 2021 on the racetrack. In addition to Monomoy Girl returning to Cox, Toffey said that Got Stormy will remain in training with Mark Casse for another campaign. Spendthrift's stallion roster could still grow, too, as the farm has yet to announce whether Authentic, winner of the Breeders' Cup Classic on Saturday, will race for another season or join his sire, Into Mischief, in the stallion barn. "Stay tuned," Toffey said Sunday night.