Basically, the set looks to be very good, and were excited to see how it impacts things
At its core, the card is a four-mana blue prejudice enchantment that says whenever an opponent casts a creature spell that doesnt share a color with a creature you control, counter that spell unless that player pays X, where X depends on the difference in color
You can get more uses out of this with cards like Ashaya, Soul of the Wild and enchant a creature you control, like Circle of Dreams Druid or Karametras Acolyte
[c]City of Brass[/c], [c]Mana Confluence[/c], [c]Exotic Orchard[/c], [c]Forbidden Orchard[/c], and [c]Gemstone Caverns[/c]: are all functionally similar to [c]Command Tower[/c], only they come with slight downsides and restrictions