Lavinia of the Tenth | Magic: The Gathering
Formats Lavinia of the Tenth is Legal in
Official Oracle Text for Lavinia of the Tenth
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.)
Official Rulings for Lavinia of the Tenth
4/15/2013 : The static abilities of a detained permanent still apply. The triggered abilities of a detained permanent can still trigger.
4/15/2013 : 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.
4/15/2013 : If a permanent's activated ability is on the stack when that permanent is detained, the ability will be unaffected.
4/15/2013 : If a noncreature permanent is detained and later turns into a creature, it won't be able to attack or block.
4/15/2013 : 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.
4/15/2013 : The converted mana cost 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.
4/15/2013 : 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.