Mega Lucario EX has two moves, with Aura Jab requiring one Fighting Energy to deal 130 damage to a target and move three basic Fighting Energy cards from the discard pile to Benched Pokmon
In Modern, some Jund Midrange decks utilized Traverse the Ulvenwald in Tarmogoyf decks, playing cards like Tarfire for an additional card type (tribal) to hit card types in the graveyard
This can be absurdly beneficial if you want to make a multicolored Limited deck
It can even be worth playing a pure life gain card like Zuran Orb if you have enough card advantage or card quality effects to absorb a dead card
So even if Nahiri, the Lithomancer and the rest of the 2014 planeswalkers get a little bump from their card type, it's hard to imagine any of them being more than a few dollars at this time next year
Even if you arent planning on attending any ultra-competitive tournaments anytime soon, Id still recommend building a sideboard to accompany your deck