A card with a “zero” in its mana cost is always going to the get the attention of MTG players, and when it’s attached to the phrase “counter target spell,” control mages the world over ...
The original Tarkir block had a cycle of three-color lands to match the set’s five clans, such as Sandsteppe Citadel, Nomad ...
As blue in MTG is known for being the “control” color, counterspells perfectly fit into that niche. They typify an archetypal blue spell that stops your foe from doing what they want to do ...