Forgotten Rules is one of 19 stayers left in Thursday's Gold Cup at Royal Ascot.
Dermot Weld's unbeaten gelding wouldn't want the ground too quick, though, and conditions in Berkshire continue to be dry.
Aidan O'Brien has left last week's Saval Beg winner Kingfisher in, while Ed Dunlop's Chester Cup winner Trip To Paris has been supplemented at a cost of £35,000.
Also a winner at Lingfield and Ripon this season, his progress showed no signs of stopping when second to Vent De Force in the Henry II after a troubled passage.
His trainer told www.edunlop.com: "Following hours of deliberation, the decision has been made to supplement Trip To Paris for the Gold Cup on Thursday.
"This hasn't been an easy call, with £35,000 a hefty sum of money, but he's a young, progressive stayer who enjoys quick ground.
"If all of the principals turn up then we have plenty to find, but in all likelihood there will be a few significant defections with the ground good to firm and the forecast dry.
"His owners are keen to run and it's impossible to knock such a sporting decision - here's hoping it proves a fruitful one."
Peter Niven's progressive Clever Cookie, James Fanshawe's High Jinx, Marco Botti's Tac De Boistron and the German raider Alex My Boy, formerly with Mark Johnston, are all still in the mix but are at their best when the mud is flying.
Brown Panther is back for another go having run well in the race last year, while Luca Cumani's Mizzou, winner of the Sagaro Stakes, and Hughie Morrison's Vent De Force will both be among the stronger fancies.
Pia Brandt's Bathyrhon, David Lanigan's Biographer and the Andrew Balding duo of Havana Beat and Scotland are all among those to stand their ground too.