When Detention Sphere enters, you may exile target nonland permanent not named Detention Sphere and all other permanents with the same name as that permanent.
When Detention Sphere leaves the battlefield, return the exiled cards to the battlefield under their owner’s control.
The "enters" ability has only one target. The other permanents with that name aren't targeted. For example, a permanent with protection from white will be exiled if it has the same name as the target nonland permanent.
01-10-2012
wotc
If the target nonland permanent is an illegal target when the "enters" ability tries to resolve, it won't resolve and none of its effects will happen. No permanents will be exiled, including those with the same name as the target.
01-10-2012
wotc
If Detention Sphere leaves the battlefield before its "enters" ability has resolved, its leaves-the-battlefield ability will trigger and do nothing. Then the "enters" ability will resolve and exile the targeted nonland permanent and other permanents with that name indefinitely.
01-10-2012
wotc
Although the target of the "enters" ability must not be a land, lands with the same name as that permanent will be exiled.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.
Kev Walker2012-10-05
