Lavinia of the Tenth

Protection from red
When Lavinia enters, detain each nonland permanent your opponents control with mana value 4 or less. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

Ravnica: Clue Edition

Protection from red
When Lavinia of the Tenth enters the battlefield, detain each nonland permanent your opponents control with mana value 4 or less. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

RNA Guild Kit

Protection from red
When Lavinia of the Tenth enters the battlefield, detain each nonland permanent your opponents control with converted mana cost 4 or less. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

Dragon's Maze

Activated abilities include a colon and are written in the form "[cost]: [effect]." No one can activate any activated abilities, including mana abilities, of a detained permanent.

If a creature is already attacking or blocking when it's detained, it won't be removed from combat. It will continue to attack or block.

If a noncreature permanent is detained and later turns into a creature, it won't be able to attack or block.

If a permanent's activated ability is on the stack when that permanent is detained, the ability will be unaffected.

Lavinia's ability doesn't affect permanents an opponent gains control of after its enters-the-battlefield ability has resolved. Similarly, if you gain control of a detained permanent after that ability resolves, it will continue to be detained until your next turn.

The mana value of a creature token is 0 unless that token is a copy of another creature, in which case it copies that creature's mana cost.

The static abilities of a detained permanent still apply. The triggered abilities of a detained permanent can still trigger.

When a player leaves a multiplayer game, any continuous effects with durations that last until that player's next turn or until a specific point in that turn will last until that turn would have begun. They neither expire immediately nor last indefinitely.