A great example is a deck I profiled last year, Joel Micks Alpha Elves. At its essence, this deck is just three unique cards: Forests, Llanowar Elves, and Giant Growths
We finish with the unusual uncommon in my top spot
They share the front sides total mana cost, and when not on the battlefield, they only have the characteristics of the front side
The set's lead, Eric Engelhard, discussed the issue in a recent design article
The Norin, Swift Survivalist from Duskmourn: House of Horror isn't quite as fun, but a flavorful option
With these cards there is no chance of buying a clipped Beta card, as long as you are familiar with what makes them unique