Australian bred three year-old I Am Invincible filly Imperatriz provided Te Akau Racing with yet another Group I victory when beating her stablemate On the Bubbles to win the Group I Levin Classic (1600m) at Trentham on Saturday.

Jamie Richards’ relentless dominance of New Zealand racing keeps rolling on into his final few weeks in New Zealand, saddling all of the first four placegetters – the second time he has achieved that remarkable feat this season alone.

Richards – who will head to Hong Kong later in the autumn as just the second New Zealander (after Paul O’Sullivan) invited to join their red-hot training ranks – had five runners in Saturday’s three-year-old feature and dominated the finish with Imperatriz, On The Bubbles, I Wish I Win and Mohawk Brave.

Imperatriz had also featured in Richards’ previous Group One first-four, chasing home stablemates The Perfect Pink, Shepherd’s Delight and Belle En Rouge in the New Zealand 1000 Guineas (1600m) at Riccarton in November. But on Saturday she was the undisputed star of the show.

Rated a $2 favourite after a breath-taking five-length romp against older mares in last month’s Lisa Chittick Plate (1400m) at Matamata, the I Am Invincible filly blasted clear of her rivals to beat Group I winning colt On the Bubbles by three-quarters of a length.

“She’s a weapon – just an absolute weapon,” McNab said. “She put herself there, and I had to be so patient. I didn’t want to go too soon, because she was just that little bit suspect at the mile. At the same time, I knew where ‘Parkesy’ (Johnathan Parkes) was on On The Bubbles, and I didn’t want to let him out either.

“But when she went, there was no stopping her.”

Imperatriz was bought for $360,000 at Magic Millions from the Bhima Thoroughbreds draft by David Ellis and was bred by Raffles Dancers Pty Ltd.

“She was brilliant today,” Jamie Richards said. “She’s a very good filly, and I’m very proud of her.

“She was able to hold her spot today from her good barrier. They didn’t run overly quick and it wasn’t a truly run mile, which probably suited her. It took the backmarkers out of the race.”

Now a four time stakes-winner, Imperatriz has the overall record of six wins and two placings from nine starts and is the second foal and first winner for Berimbau, a Group II placed Shamardal (USA) mare from the family of Group II winner Royal Courtship.

Imperatriz becomes the 12th Group I winner for champion sire I Am Invincible, who has 41 entries for Inglis Easter.