Space Oddity

When Space Oddity enters the battlefield, exile target creature you control. It becomes an astronaut. At the beginning of your upkeep, if an astronaut you own is in exile, you may choose a card you own in exile at random. If you do, shuffle it in your library, then draw a card.
"I don't know where I'm going from here, but I promise it won't be boring." - David Bowie