mtg phyrexia all will be one booster box - PHYREXIA: Booster Pack Prices | Magic

At the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature

During exploratory design and early vision design, we tried different ways to convey a large scope in Magic

I have placed it very high up on my own list as well, but I am not sure whether I really think it is better than Veil of Summer or Force of Vigor, given that it is just a dumb, head-through-the-wall type card and the others are very specialized but devastating interactive cards

For six mana you get to pick between destroying all tokens in play, or, instead, destroy all nonland, nontoken permanents

How can I tell the rarity from the card?