Silence

Instant, W (1)
Your opponents can't cast spells this turn. (Spells cast before this resolves are unaffected.)
"All the wizardry in the world has to pass through one small and easily sealed door."
-Ajani Goldmane
Illus. Wayne Reynolds

Gatherer Card Rulings [Nov 2009]

• 10/1/2009: The only thing Silence does is prevent your opponents from casting spells. They can still activate abilities, including abilities of cards in their hands (like cycling). Their triggered abilities work as normal, they can still play lands, and so on.
• 10/1/2009:

Format Legality	Legal in Vintage, Legacy, Extended, Standard
Printings (1/9)	Magic 2010 (Rare)