Oracle Text

Exile each creature you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step.

Card Rulings

2/1/2006 When the creatures are exiled, any Auras or Equipment on them fall off and any counters on them are removed. When they return to the battlefield, they come back untapped and are treated as new versions of the cards.
2/1/2006 Normally, the creatures will return to the battlefield at the end of the same turn they were exiled. But if they’re exiled during the End step, it’s too late to return them this turn. They have to wait to return to the battlefield until the next End step.
2/1/2006 All cards exiled with Ghostway will return to the battlefield, even if they’re no longer creatures.