Typically, after a set's initial hype, singles prices fade significantly, inevitably leading to a plethora of bulk rares and sub-$1 Mythic Rares
Someone like Christopher Rush (the artist behind the original art of Brainstorm, Mana Leak and Lightning Bolt, among many others) can increase the value of cards
Given that the eventual payoff is potentially a lot of free cards, that sounds good in any blue deck
- Merriam Webster Online Dictionary - A staple card is one that is seen in a majority of the decks in a given format, included in a wide variety of differing lists because it fulfills a universal need, such as searching for Pokemon or energy, or drawing cards
Every now and then you can get really crafty by giving an opponents creature shroud, which can blank a combat trick or aura
For example, if you control an Omnath, Locus of Creation and make a nonlegendary copy of it with Irenicus's Vile Duplication, you can use regular copy effects on the new token to skirt the legend rule