While the effect of making a player lose the game by paying one mana of every color is a nice shortcut, since it requires your opponent to have ten or less life, most of the time you're better off saving that mana for spells since they'll be defeated soon anyways
Build your collection, know the value of each card, and keep a precise history of what youve scanned and discovered
My favorite color so far is black because of all the good common removal spells, but every color combination felt fine to me
For example, thanks to Aria's effect, it caused Melodious cards like Canon, Tamtam, and Fortissimo to become unplayable
Chalice of the Void is excellent
Unfortunately (or some would say fortunately), dead is a good way to describe this card