The Hoopers are part of the group that was brought together to race Isti Star by Yarramalong Park after she passed-in when failing to reach her $140,000 reserve at last year's Magic Millions Coast Yearling Sale.
Her dam is the Redoute's Choice mare Istiraaha, who is a half-sister to Group 1 winner Rewaaya.
Isti Star finished second-last in the $250,000 Magic Millions Debut in December but was spelled and returned to finish fourth in the Listed Calaway Gal (1200m) first-up before securing her place in the National Classic field with a 5-1/2-length maiden win in a 1100m Ipswich maiden.
The brown filly dropped back to 1000m on Friday night, but was put in all the rights spots by Melbourne Cup-winning jockey Michael Rodd and dashed clear in the straight to have the race won a long way from home.
The $7.50 chance scored by one length from Victorian visitor Prince Tycoon, the $2.70 favourite, who travelled wide throughout after a tardy getaway but hit the line well to claim second, half-a-length in advance of Secret Sort ($41).
"Obviously she was identified early as a horse with immense talent and we thought we could win the Magic Millions with her, but it went terribly wrong," Shailer said.
"She's a horse that suffers from some allergies and she went shin-sore (so) we had to put her aside and be patient.
"At Ipswich she was brilliant, and tonight again she proved she is a quality filly.
"She's going to get better with age. She's versatile and I think she'll stretch out over seven furlongs-plus."
