原文Graceful Reprieve's effect works only once. If the targeted creature leaves the battlefield and is then returned to the battlefield, it's considered to be a new creature. If that new creature is put into a graveyard, it won't come back a second time.
2017/03/14
原文Graceful Reprieve can target a token creature, but since tokens cease to exist after they leave the battlefield, it won't be returned to the battlefield.