If the cards listed here dont meet your needs, I also recommend searching through Scryfall or Gatherer you might find a gem thats perfect for your decks specific strategy
Typically, letting your opponents draw cards is the worst strategy imaginable, but Selvala implies youll be parleying these extra cards into favors at the table
This five-ability 7-drop with seven loyalty is next on the list
It just uses the word, "Swamp." Another good example is extort, which has the Black and White symbols in the reminder text, or a fetchland like Mountain Valley that clearly is Red and Green in flavor and mechanically, but is allowed in decks without Red or Green
Honorable Mentions: Even though it's not as expensive a card as the ones mentioned above, it's mentioned precisely because of its versatility in play and the recent moments of diversity in Fighter-type decks thanks to the hype of Lucario-VStar in the Joinville regional and the return of the cards of Urshifu-VMax -Rapid Strike-
These are split into two sets of five, so you can purchase either or both