Instant
Cast
this
spell
only
during
an
opponent's
turn,
before
attackers
are
declared.
Creatures
the
active
player
controls
attack
this
turn
if
able.
At
the
beginning
of
the
next
end
step,
destroy
all
non-Wall
creatures
that
player
controls
that
didn't
attack
this
turn.
Ignore
this
effect
for
each
creature
the
player
didn't
control
continuously
since
the
beginning
of
the
turn.