American Tom took the field along, with the remaining trio racing together for the first circuit, and Arctic Skipper was the first to crack.
American Tom made a mistake five out, allowing A Toi Phil and Woodland Opera to close the gap, and the leader was not fluent at the third-last either.
Woodland Opera began to toil but A Toi Phil was still travelling strongly and hit the front between the final two obstacles before coming nine and a half lengths clear of American Tom.
The 6-4 shot's victory completed a treble on the card for trainer Gordon Elliott and owners Gigginstown House Stud, and a double for jockey Jack Kennedy.
Elliott said: "In his own grade, he is brilliant and won't let you down and Jack gave him a great ride again today.
"It's been a good day."
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