The Things in the Fog

Whenever a creature your opponent controls
becomes tapped, you may exile it. Return it to
the battlefield tapped under its owner's control
at the beginning of the next end step.
At the beginning of each opponent's upkeep,
they may put a Vigilance counter on a creature
they control.
"Don't go into the fog! Or else they will snatch you!"
—Gertrude the Sane