Boyd Cordner has rated himself a "100 per cent" certainty of leading NSW in the State of Origin decider, shrugging off a calf complaint that has dogged the Blues' preparations for game three.

The NSW skipper - who even consulted a Sydney energy healer in a bid to be fit for one of the biggest games in Origin history - confirmed he would take his place, ensuring Laurie Daley's side is the first since 1996 to feature an unchanged line-up in all three games of the series.

100 per cent: Boyd Cordner believes he's a certainty to start for NSW in State of Origin III. Credit:AAP Image/Dave Hunt

Having admitted he thought he was only a "50-50 chance" last week, Cordner was so buoyed about his ability to get through a closed-doors session on Sunday he told reporters on Monday morning he was guaranteed of leading his state onto Suncorp Stadium on Wednesday night.

Asked to rate his chances, Cordner said: "After yesterday I'm 100 per cent.