Taeko was always a thinly veiled allusion to TMNTits right there in the Turtle Ninja creature typeso the upcoming crossover has prompted some fans to buy Taeko in case we get more cards that care about Ninjas and/or Turtles, like Heroes in a Half Shell
The core of the deck is to play anything and everything that lets you scry cards, manipulating the top of your deck to almost always put a land on top, so you can ramp up faster and faster
Yes, Bucolic Ranch does well in the Selesnya mounts decks and can help you splash a cool off-colored mount, but it is pretty limited
Kirri, Talented Sprout A programming note: While many cards have received an errata that replaces postcombat main phase with second main phase, Kirri, Talented Sprout has received one that states each of your postcombat main phases
Not only does Borborgymos threaten to one shot people he has a reasonable amount of board control allowing you to stabilize a bad spot