In fact, we could have done this piece with only the multicolored cards and still had lots to talk about
Well, that is, unless Wizards has something to say about it
Azors Gateway / Sanctum of the Sun I recall people losing their minds over Sanctum of the Sun when it was revealed, but as appealing as it is to tap a single land for 30-40 mana, its actually appropriately gated behind the Azor's Gateway mini-game
While Esika can provide substantial mana-based value, its alternate side - the Prismatic Bridge - is a five-mana enchantment that states that at the beginning of your upkeep, you reveal cards from the top of your library until you reveal a creature or Planeswalker, putting that card directly into play
Having a tutor on a stick is one thing, but then having that tutor also put stuff into play immediately really makes Zur obnoxious