Swiftblade of Twilight

Fraying Existance 2 (Whenever Swiftblade of Twilight leaves the battlefield, target player puts
the top 2 cards of his or her library into his or
her graveyard.).
{2}{w/u}: Exile Swiftblade of Twilight. At the beginning of the next end step,
return it to the battlefield under its owner's control.