I did it way back when Whizbang first came out, but I was under the impression they haven't updated the decks.
Not sure exactly how that works these days. I thought about retrying the run to Legend with . . . I can't even remember what the other Whizbang-like card is called, but once was enough for me.
Besides, despite what people always like to pretend, there's a rare diversity of meta right now. I'm busy enjoying Standard as is.
Yeah there's no way you're going to get anywhere close to legend in standard with randomly generated blizzard decks (zayle is the standard equivalent of whizbang btw). I have a hard enough time believing you got legend in wild with whizbang tbh, but if you really did you should take that w and walk away, lol.