Ashcoat makes all your rats much more powerful when it attacks, and it can bring some back from the graveyard for you - what rats deck wouldn't want that
Its also one of the few bad matchups of the juggernaut that is Regidrago VSTAR, which was one of the most dominant decks of the year
In the first event, the PSA upcharge implicitly punishes someone for knowingly submitting to the wrong tier
Getting a bunch of 0/1 creatures is a great way to shield your life total from many threats with haste after a Day of Judgment, and then you can sacrifice those that make it to your turn to rebuild your board position with minimal fuss, and possibly even a Blood Artist trigger or three
coven cares about the current value
For the most part, this set presents a lot of the same: Pokmon- EX that maintain most of the power, ineffective rare cards, and only one Special Energy this time around (and a fairly boring one at that)