Lavinia, Azorius Renegade

Legendary Creature — Human Soldier

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."