Lets be honest while some are going to play this because they have a lot of creatures that care about counters, most are going to be equipping this to silly things like Kiora, Behemoth Beckoner (7/7 for 3 mana) or Teferi, Time Raveler, or Narset, Parter of Veils, or Jace Beleren, or Wrenn and Six
There are many more cards that couldve made the list, or historically significant creatures that have had their place and time
These are cards that could mechanically exist in Magics existing rules framework, and could be printed into a black-bordered set
Drop it on turn two, and watch the parade of Arrogant Wurms, Roar of the Wurms, Deep Analysis, Basking Rootwallas, Wonders, and other such nonsense begin
For 5 total mana divided across turns, you can steal opposing cards and pay mana to play them later, which can be beneficial in the grindy match-ups
Not all rare cards are created equal