Nicholls was completing a big-race double on the card having earlier landed the John Romans Park Homes "Rising Stars" Novices' Chase with Modus.
The JP McManus-owned chestnut was the 4-6 favourite to follow up his recent chasing debut success at Bangor and readily pulled nine lengths clear of Kalondra in the hands of Sam Twiston-Davies, with the front-running Valhalla already tailed off when falling at the final fence.
Twiston-Davies said: "This fellow is very smart and he kept on nicely. He picked up well in the straight and he's come home in front.
"At the end of the day, it was only a three-runner novice chase, if a competitive one, and there's bigger tests in front of him.
"He jumped well today and hopefully he can keep progressing and get slicker over his fences."