Until then, draw well, planeswalkers
These lands are mighty for a few reasons, but the most important one is that you can sort out a lot of mana issues because they all have two basic land types - which means you can fetch them up with a lot of different ramp spells, and even fetch lands too
Being able to copy the card-draw trigger from Showdown of the Skalds, the Angel trigger from Firja's Retribution, or the destroy triggers from Waking the Trolls or Binding the Old Gods for just a single mana seems pretty solid
When rotation happens, the difficult GX matchups will go away, and a couple of 1-prize decks that are good right now also will rotate (Spiritomb & Blacephalon)
From Wizards ' perspective, this would open up a massive new stream of reprint equity, giving Wizards plenty of in-demand reprints to fill supplemental products for the next several years and probably longer, considering how much demand there is for cards like the original dual lands
Morty ( Wisdom of Sea and Sky ) looks at a number of cards on top of the opponent's deck equal to the number of Psychic Pokmon the user has in play, then lets the user rearrange those cards in any order