Rule Of Law

Permanents that limit how MANY spells a player may cast each turn, almost always to a single spell. Rule of Law and Archon of Emeria stop every player from casting more than one spell per turn; Deafening Silence caps noncreature spells at one; Ethersworn Canonist caps nonartifact spells at one. These shut off storm, combo chains, and explosive multi-spell turns. Distinct from Casting Restriction, which flatly forbids a class of spells from being cast at all rather than counting how many you get; these cards let any spell resolve but stop the second one in a turn.