Aura of Silence
Enchantment
Artifact and enchantment spells your opponents cast cost 
more to cast.
Sacrifice this enchantment: Destroy target artifact or enchantment.
D. Alexander Gregory
Magic Online Promos (PRM)
• #36030Rulings
Aura of Silence affects all opponents in a multiplayer game.
(wotc • 2004-10-04)
Rulings
Aura of Silence affects all opponents in a multiplayer game.
(wotc • 2004-10-04)