The upside of our milling counters is that they can deal with pretty much anything (outside of Shifting Ceretops, which we don't talk about here in Mono-Blue Mill land), for the fairly reasonable cost of three mana
But then you can activate it for four mana to proliferate, so after your opponents' defenses have been set up and you cannot attack further you can do that a few times to finish them off
Each playtest provides you with data, but the data sets are small, so we collect the data, but it's not a statistically relevant as we'll get with external data (more on this in a second)
Because we don't have art (or really even a lot of color) on our playtest cards, we get the illusion of color through what we sticker the card on
It is an image that communicates everything you need to know about the character in a single frame, and it has lost none of its impact in the nearly three decades since it was first printed
Wall of Mourning Creature Wall Defender When this creature enters, exile a card from the top of your library face down for each opponent you have