That said, unless you have town synergies, you dont need to pick Capital City highly, though its likely better than most mediocre commons
When I roll a d20, I can get any number from 1-20, and Ill get the average by calculating min + max / 2, so (1+20)/2 = 10.5
The reason this card is so powerful is two-fold
As usual, we're looking at ambiguously powerful or fun cards for Commander, and they must be brand-new to Magic --so no reprints on this list
Plus, keeping one mana up as a Blue player is a completely natural thing to do, and just the threat of this card will have your opponents reconsidering their life choices
Emet-Selch was one of the first cards previewed for Final Fantasy, way back in February