Lavinia, Azorius Renegade is a rare Legendary Creature — Human Soldier card from Ravnica Remastered (RVR), collector number 370. Current market price: $0.46 (foil $0.47), 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.