After the big news, they presented a watch list for cards that its considering for the Game Changers list in future
Without more hard counters, your opponents will have plenty of chances to play their early game unfettered, though late-game you will likely have the say on whether a spell resolves
And once enough cards are floating around in exile, his activated ability can be used to pull them all from exile at once
Ninjutsu is an ability that can be used at any point while a creature is considering attacking, and that includes after damage has been dealt and triggers have been put on the stack
An obvious potential home for Nature's Rhythm is some sort of Overlord Rampstyle deck where Overlord of the Hauntwoods offers so much mana that paying a two-mana tax to tutor up the right creature in the right situation isn't a big deal
Cast a cat, get a Dog token