Sideboard card against Loam decks... no more tricks. Also good against decks with Isochron Scepter or against combo decks, as if a blue control deck would have problems with those anyway.

  -- By Nicholas from Los Angeles on April 19, 2010

land isn't a spell

  -- By evan from hell on July 07, 2008

This is a neat Card, I expect(hope it) to pick up in the upcoming years.

  -- By Matt Snihur from Corbin, KY on May 29, 2008

you wanna know what this is really for? look at the card illustration. It's really for mana supression. Get it out on turn two and declare a basic land type. boom, instant manalock. Just leave one mana open and watch your opponent stare hopelessly at his hand in woe over anything costing more than 3 mana.

  -- By Anonymous from Valencia, CA on April 28, 2008

For Blue Control, Declaration of Naught is a stellar side-board card! A very tight combo with Telepathy!

  -- By ferrioso from Colorado Springs, CO on March 05, 2008

this thing is UNBELEIVABLE. the blue mage can now counter all the 4 copies of dragonstorm for uuuu. THATS FOR STIFLES. and u can counter stuff that doesnt have activated abilities like EARWIG and HELLKITE or THOUGHTSEIZE. this thing is amazing

  -- By Anonymous from moon on February 05, 2008