Kataton, Titan of Beast's Beck

When Kataton enters the battlefield, sacrifice it
unless it escaped.
Whenever Kataton enters the battlefield or
attacks, reveal the top six cards of your library
and attach a creature card from among them to
Kataton. that card gains bestow.
Escape—{g}{g}{w}{w}, exile five other cards from
your graveyard. (You may cast this card from your
graveyard for its escape cost.)