The Cube Of Shadows

When this card enters the battlefield, choose a
color. Exile every creature of the chosen color,
then destroy all creatures. Then, return all
creatures exiled by this card back to the
battlefield under your control.
{4}{b}{u} Exile target creature, then create a token
that is a copy of that creature except it is a
black and blue zombie in addition to other types.
when that token leaves the battlefield, return the exiled creature to the battlefield under its owner's control.