I run four copies in a Modern poison counters deck, where that extra +1/+1 really makes a difference when I attack with a Phyrexian Crusader
The key here is how well Snow White's original outfit and demeanor are maintained in the Enchanted artwork by Otto Schmidt , with a large shield and a partial suit of armor fitting into her classic outfit in a surprisingly unobtrusive way
Ive included Propaganda and Dissipation Field as attack deterrents, as well as ways to make other tokens for blocking, like Shark Typhoon, Saheeli, Sublime Artificer, and Goblinslide
For example, if the chosen exiled card is a land card, you may play it only during your main phase while the stack is empty
Outside of mono-colored decks, and some decks in older formats that use Fetch Lands, Multiversal Passage can improve multicolored manabases across formats
And metalcraft to beat the band