Even if they dont have Parhelion II in their graveyard, you should hold up a removal spell as they can easily Grisly Salvage at the end of your turn or Thoughtseize themselves on their turn and follow it up with the motorcycling creature
in fact, most of them are just basic lands
Countless years ago, in his quest for ever-increasing pain, he managed to catch a cellarspawn and extract its essence to inject into himself, hoping that infusing himself with pure fear would inflict an agony upon him that no one had ever felt before
All it asks is that you empty your hand, and it is fast enough that it can go into those decks that try to empty their hands as quickly as possible
They are calling this the rarity key, and the rare, super rare and legendary symbols will be holographic on the cards (or some kind of shiny gradient), to make it even easier to differentiate
Not only was the panel celebrating one year since the TCGs launch but also two years since it was formally announced here at D23