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
Sacrificing the creature is part of the cost, and players do not get priority during the middle of the casting process
Jumpstart Booster Boxes Note: I am speaking specifically about the yearly release line of Jumpstart, including products such as Jumpstart 2020 and Jumpstart 2022
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
These are cards that could mechanically exist in Magics existing rules framework, and could be printed into a black-bordered set