As we've seen from Sazh's Chocobo - The chocobo cards are, as a group, going to have a distinct lands focus, and this certainly helps them out
15 Teferi, Mage Of Zhalfir You're Playing On My Time Locking down your opponents has never felt better than the original creature version of Teferi, Mage of Zhalfir
A hasty 7/5 that cant be blocked by chump tokens or utility dorks is threatening, especially because the cost of trying to get rid of it is losing an artifact or creature
The other archetypes in the Cube look like they can really snowball in a hurry around Turn 4, which also places heightened importance on cards like Thalia, Guardian of Thraben and Mana Tithe
The Stone Brain to deal with the primary win condition from Lotus Field or etc, while also helping against UW control
It sets up two delayed triggered abilities: one that triggers when you win the flip, and one that triggers when you lose the flip