If you choose to focus on the token making part of Judith you should have plenty of aristocrat effects at your disposal if youve been in the format for a while as well
Here are a few ways you can win by playing a single card: Being the only girl, being the only one without points, having an even number of players in the game, having five or more cards, owning a pony
Xyz (black): A monster that must be Xyz Summoned
8 Super Rare cards, as well as 1 Common card, are also available as Over Rush Rare.
Though even for this kind of stuff, it's not uncommon to see a mono-coloured deck splashing another colour (if you're unfamilar with the term, it means adding one or two cards of another colour but not commiting to that colour for the deck)
While the all-white design might divide opinions in terms of visual appeal and distinction, the nearly $250 market price puts this card in a different league