Instant
Cast
this
spell
only
during
your
declare
attackers
step.
This
turn,
instead
of
declaring
blockers,
each
defending
player
chooses
any
number
of
creatures
they
control
and
divides
them
into
a
number
of
piles
equal
to
the
number
of
attacking
creatures
for
whom
that
player
is
the
defending
player.
Creatures
those
players
control
that
can
block
additional
creatures
may
likewise
be
put
into
additional
piles.
Assign
each
pile
to
a
different
one
of
those
attacking
creatures
at
random.
Each
creature
in
a
pile
that
can
block
the
creature
that
pile
is
assigned
to
does
so.
(Piles
can
be
empty.)