Button paid $120,000 for Finsceal at the Ready To Run sales at the Gold Coast.
“He was a good style of horse and breezed up really well and I thought he was nearly the best to go through the breeze ups,” he said.
“Unfortunately, he was never paid up for the Magic Millions so if he goes to the Magic Millions Guineas next year, he’ll have to win a wildcard race somewhere.”
Button has named the Heathcote-trained Sergeant Silva as the main threat to Finsceal.
The 3YO is chasing a hattrick of wins after scoring twice at the Sunshine Coast last month and will also clash with stablemate Duchess Of Rothesay.
Heathcote finds it hard to separate his pair as Duchess Of Rothesay is coming off a maiden win at the Gold Coast on August 21.
“There’s a few similarities with both these horses as I trained both their mothers,” he said.
“I had considerable success with Duchess Rothesay’s mother Treatmelikealady while Sergeant Silva’s mother Hallmark Star was an exciting galloper.
“She won three races in a row before hurting a tendon later on which finished her career."