Chronos, Titan of Time's Blade

When Chronos enters the battlefield, sacrifice it
unless it escaped.
Whenever Chronos enters the battlefield or
attacks, return target permanent to its owner's
hand, then tap or untap target permanent.
Escape — {w}{w}{u}{u}, Exile five other cards from
your graveyard. (You may cast this card from your graveyard for its escape cost)