mtg blue search your library for a card Rules Text: search, library, card, creature, your, Type: Instant, Sorcery, Colors: Blue, 82 cards you may search your library for an instant or sorcery card with converted mana cost 2 or less MAGIC THE GATHERING 2003 SCOURGE

If you assemble Tron on turn three and you dont have a Karn Liberated in hand to cast instead (which is what you really want in these matchups), then you can cast your Thoughtseize-on-a-stick and present a clock that will kill your opponent on your eighth turn

Other times, you'll need to be more careful

For example, blue decks in Pauper use Thought Scour and Mental Note to power out Tolarian Terror and Cryptic Serpent, while Vintage Dredge decks use cards like Prized Amalgam and Vengevine to flood the board with creatures from the graveyard

Great Wall was there to stop that card and only that card er, rather, take away its crappy ability