You don't spend anything here, not mana, cards, tapping, or once/turn
Until end of turn, you may play the card you own exiled this way and each other card exiled this way with lesser mana value than it without paying their mana costs
The deck must be powerful enough in the late game that its pilot can be confident in a win so long as he or she can defend him- or herself and drag the game out indefinitely
If free counterspells go in bracket four (this is just me speculating, now!), and, say, Mana Drain or even Arcane Denial go in bracket three, does that plop the rest of the counterspells in brackets three and four
As MTG Rocks noted, the Nazgul uncommon is actually tough to find in collector's booster packs, and most of all, for flavor reasons, this card has nine different versions of its illustration to represent the actual Nazgul characters
If you lose tempo early and you're struggling to keep up with your opponent, you have two copies of Be Prepared you can use to wipe the board and start fresh