Leon and Troy Corstens thought enough of their Written Tycoon filly Supercilious to make her career debut in the Group II MRC Blue Diamond Prelude in February and while she finished out of the placings on that occasion behind Hayasugi, she broke through for an easy win at Sandown on Wednesday.

With Blake Shinn in the saddle, Supercilious raced clear to wake the 1300m assignment by a length at her third start.

Stable representative Will Larkin was relieved after the $300,000 Magic Millions purchase for Malua Racing from the Newgate draft opened her winning account.

“She was a big purchase for us. We don’t spend that money too often, but Troy just loved her,” Larkin said.

“Luckily, we have good clients in Double R Thoroughbreds and the Morrissy family.

“Getting that win for the page is important, especially in town. She is well-bred and has a close relationship with some fast horses.

“She is a scopey filly that will get better when stretching out, and the 1300m is definitely a tick.”

Bred by China Horse Club Racing, SF Bloodstock, and Hollymount Stud, Supercilious is a three-quarter-sister to Group II MRC Rubiton Stakes winner Marine One and Group III ATC Maurice McCarten Stakes winner Cannonball, who are both by Capitalist.

She is the third winner from three foals to race from Group I placed stakes-winning Snitzel mare Golconda, who is due to foal to Capitalist again this spring.