Definition of "wizardest"

"Oh, gosh," he groaned, "and I'd have given anything for a refill of that suet! It was the wizardest muck we've had this week."

1951, Anthony Buckeridge, Jennings Follows a Clue

So as a driving car the 240 is possibly the wizardest Mark II of the lot, and it is perhaps only now beginning to receive the appreciation it truly deserves.

2016, Richard Skelton, A Life Awheel: The ‘auto’ biography of W de Forte, page 178