Rules - Transport

Transport X : When this creature attacks, you
may target any number of attacking creatures
without flying that you control whose combined
toughness is X or less. Those creatures phase out.
At the end of combat, if this creature was not
destroyed those creatures phase in and another
combat phase begins where those creatures are
tapped and attacking that player, planeswalker,
or building creature that player controls. The
defending player may only block with creatures
during that phase t