Not unlike the now-defunct Branded gameplan of Special Summoning a useless lock target like Gimmick Puppet Nightmare to the opposing board, this halted any play but without the meager counterplay of Tributing over a bad gift or otherwise sending it to the GY
Best played in the mid to late game when your board is already somewhat developed oh geez, can you picture this thing paired with rabbits
Besides the obvious choice for commander format, it is being viewed by modern players as a potential addition to the Azorius Spirits deck in the format
Similarly, the power of the creature attacking you is checked only when MacCready's second ability triggers
Why are Pokmon cards all the same size
Not only that, the card offers double strike which plays into winning through Commander damage, especially if its equipped with a powerful artifact or two