Each opponent can't cast noncreature spells with mana value greater than the number of lands that player controls. Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.
"I told Jace that Ravnica would fall apart if he didn't take his responsibilities seriously. I didn't want to be right."
![Lavinia, Azorius Renegade [Ravnica Allegiance Prerelease Promos] MTG Single Magic: The Gathering](http://www.undiscoveredrealm.com/cdn/shop/products/lavinia-azorius-renegade-ravnica-allegiance-prerelease-promos-mtg-single-magic-the-gathering-751920_1024x1024.jpg?v=1693761617)
