Lavinia, Azorius Renegade is a rare Legendary Creature — Human Soldier card from Ravnica Allegiance (RNA), collector number 189. Current market price: $0.42 (foil $1.10), TCGplayer market prices via Scryfall.
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.