Justice may be blind, but Lavinia is always watching.

Secret Lair Drop

Lavinia, Azorius Renegade

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."

Mystery Booster 2

Ravnica Remastered

Time Spiral Remastered

Each opponent can't cast noncreature spells with converted mana cost 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.