While it's probably the new go-to card if you want to build a horse-tribal deck, the more powerful Shadowfax decks will probably have only a few of the very best ponies in them
Fabled Passage is a strictly better Evolving Wilds/Terramorphic Expanse, and I would encourage people to consider running some amount of fetch lands, even slower/cheaper ones, as they can be recurred fairly easily, help to fix mana, and can trigger certain abilities for sacrificing permanents or permanents leaving play
The Cabbage Merchant (TLE) $15 The Cabbage Merchant gives you so many Food tokens for free, kind of like Rhystic Study gives you cards or Smothering Tithe gives you Treasure tokens
While a full evaluation of the set, both in terms of Limited play-ability as well as impact on the secondary market, will be dealt with at a later date, we can take a look at something immediately noticeable - the high amount of rarity downshifts, compared to rarity upshifts
Life of Toshiro Umezawa / Memory of Toshiro Life of Toshiro Umezawa is a bit awkward as a ramp piece
Designer Notes: Swarm the field with an army of fungus and saprolings, then sacrifice them to deal damage and gain life with your Commander