Some cards (particularly sports cards) with no marked edges will not be given a centering score, so this criterion will not be taken into account.) Grading follows a strict control process (more information on the grading page)
The situation with the day/night imbalance very likely has to do with its Eldrazi prisoner
Cards like Lightning Helix, Flame Slash, and Roast are good for creature removal
There are beautifully dark cards such Toxrill, the Corrosive (Showcase) or Olivia, Crimson Bride (Showcase) that make this set wonderful no matter what you pull
Triskaidekaphobia Triskaidekaphobia sets up a minigame that cares if players have 13 life or not, and you can tune the knobs by giving everybody 1 more or 1 less life life each turn
Of course, this isnt accounting for scry X cards, which would be cheating