Lavinia, Azorius Renegade has two abilities. The first prevents opponents from casting noncreature spells unless they spend mana to cast them. The second counters spells cast without paying their mana cost if the mana value exceeds a threshold. Neither ability mentions lands at all.
Playing a land is a special action, not casting a spell (CR 305.1, 116.1). Because playing a land is not a spell and does not use the stack, it is completely outside the scope of Lavinia's abilities. Lavinia cannot interact with it in any way.
CR 116.1 defines special actions as actions a player may take that don't use the stack, and CR 305.1 specifies that playing a land is one of those special actions. Casting a spell, by contrast, is governed by CR 601.2 and always uses the stack.
Example: Your opponent controls Lavinia. On your turn you play a basic Forest from your hand. Lavinia does nothing — the Forest enters the battlefield normally because you performed a special action, not a spell cast.
In short, Lavinia's restrictions are entirely about casting spells. Land drops remain fully available to opponents regardless of whether Lavinia is on the battlefield.
Unofficial fan resource — not affiliated with or endorsed by Wizards of the Coast. Answers are AI-generated estimates grounded in the Comprehensive Rules and are not a substitute for an official judge. Verify anything match-critical.