Clutch of the Blind Eternities

When Clutch of the Blind Eternities enters the battlefield, exile target nontoken creature you control until Clutch of the Blind Eternities leaves the battlefield.
At the beginning of your upkeep, you may pay {1}{u}. If you do, create a token that's a copy of
the exiled creature except it's colorless and has "When this creature becomes the target of a spell or ability, sacrifice it."