The Kelvin Tyler-trained hurdler unleashed the kind of speed that has seen him win sprint races to win his last hurling start at Timaru.
The Riccarton track improved to slow earlier this week and looks a good chance of staying in that condition with only a small amount of rain forecast for Christchurch this morning.
Tyler is hoping the better track and an improved horse should mean The Energizer can better his effort in the 4200m feature last year, when he fell at the last fence while in contention for a placing.
''The track nowhere near as heavy this year,'' he said.
''I don't think he will have any trouble seeing the distance out.''
''He settles well and he is stronger and he is a bit more seasoned this year.
''He is very good. I couldn't be happier with him. He is bouncing. He is working huge.''
The Energizer missed last Saturday's traditional lead-up, the Sydenham Hurdles.
Kiddo and Zedeedudadeeko also come in to the Grand National Hurdles after missing last weekend's race.
Zedeedudadeeko is the only horse proven over today's 4200m distance.
The 10yr-old beat a strong field when winning last year's Great Northern Hurdles over 4190m.
In his most recent hurdle start, Zedeedudadeeko added the Wellington Hurdles title to his resume.
Those wins have seen him lumped with the top-weight of 69.5kg for today's race.
Kiddo ran a fair fourth in the Grand National Hurdles last year, proving he can run a reasonable 4200m.
Last weekend's Sydenham Hurdles over 3100m was won impressively by Laekeeper.
The horse opened favourite for today's race following his brilliant front-running performance.
Like most of the field, the horse is untested at today's distance.
That is the only slight concern for his Laekeeper's backers going in to the race.
His brilliant hurdle record and his impressive lead up win mean he will be very hard for his rivals to beat.
Having tough Yamanin Vital blood from his dam running through his veins should mean the Brian and Shane Anderton trained Jackfrost has the fortitude to run out a strong 4200m.
''He will get the distance, there is no worry about that,'' Brian Anderton said.
''He will go in to it fit and well and he has done well since Saturday.''
The talented hurdler went a strong race for second in the Sydenham Hurdles on Saturday.
Jackfrost may have been able to test Laekeeper at the finish if he had not got in to an awkward position after a scratchy getaway.
''I thought it was a great run really. He didn't get a lot of room - he had other ones coming back on him - and he couldn't really jump his fences properly. He was just skipping over them,'' Anderton said.
Being trapped in tight quarters should not be an issue in today's field, which will be spread out when some runners feel the pinch of the Grand National's 4200m trip.
Should Go Go Gonza perform to his best he could provide an upset result in the event.
Despite running a solid third on Saturday, Winton hurdler Drumgold was opened by bookmakers the second to outsider of today's field behind Go Go Gonzo.
