Silkspinner Recluse

When Silkspinner Recluse enters the battlefield, you may exile another target creature until Silkspinner Recluse leaves the battlefield. Create a colorless Prey creature token with power and toughness each equal
to the power and toughness of the exiled creature and "When this creature dies, put
the exiled creature into its owner's graveyard
if it's still in exile."