Constitution Hill puts his unbeaten record and huge reputation on the line in the William Hill Aintree Hurdle on Thursday.
Nicky Henderson's charge cemented his superstar status when making it six from six under rules at the Champion Hurdle at Cheltenham last month.
The six-year-old will be prohibitive odds to crown his season with a first victory over two and a half miles before connections decide whether to pursue a chasing career next term.
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Gordon Elliott's Zanahiyr and the Nigel Twiston-Davies-trained I Like To Move It, also renew rivalry with Constitution Hill.
The Willie Mullins-trained Sharjah and Alan King's Sceau Royal, complete the sextet.
