Anecdotally, Ive won a game by casting a kicked Rite of Replication and getting five of them for massive value
In addition to this though if the player is running Cynthia, that compulsory Garchomp you had to take with you to use Lucario's ability suddenly becomes pretty viable in itself with it's Royal Blades "If you played Cynthia from your hand during this turn, this attack does 100 more damage." Browse our Ultra Prism Card Singles
While enfranchised / spike-y players might step back and say, "These cards may be better than they look because flashback is powerful," to most of the Magic community, opening a Prepare // Fight will feel miserable because they already have a stack of Moment of Heroisms and Hunt the Weaks from Duels Decks or Welcome Decks
BPhillipYork: Seems like the obvious play here is to keep having Equipment enter over and over, and would play pretty nicely with some of the For Mirrodin
Right now, singles are the cheapest way in when retailers have them, typically $4-5 each, but they almost always sell out fast
Its especially useful in decks with lots of tokens or utility permanents, turning things like Clues or Food into mana sources while keeping your curve smooth and flexible