First of all, discarding cards is not always necessarily bad, depending on what you discard, of course
Esper Sleeves: White Blue Black Mana - Realm Guard MTG Sleeves - 100 ct Esper Card Sleeves for MTG with White, Blue, and Black Mana Symbols are perfect for competitive control players or "casual" control fans
Princess Twilight Sparkle and the rest of the cards printed in the Ponies: The Galloping and Ponies: The Galloping 2 Secret Lairs are silver-bordered, and not legal for tournament play , so there are no rules concerning how her ability would work in a tournament environment
The Infiltrator has a few subtle disadvantages to his snake cousin: 1) You need to play two colors to play the Infiltrator, instead of one for Ophidian
Sire of Stagnation Eldrazi for the Win-Razi
If you suspect your opponent's holding up a counterspell, you can invest your mana into plotting your spell, then wait for a later turn when your opponent's tapped out to cast it