This allows you to use potentially powerful cards like Constant Mists and at least get a powerful creature to replace the land you lose
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You could have just had more than one in your deck, or you could splash some blue mana to cast Vesuvan Doppelganger
"FFRK"
As a stand-alone card, Vexing Puzzlebox is okay, but with a deck loaded with dice to roll, it can quickly turn into a repeating artifact tutor
Green has loads of in-color synergies that work, and you don't even need to do this as a sorcery, so you can wait until the end of someone's turn, tap out and discard a card and dig up something nice and toss it onto the battlefield