Artifact
Whenever
you
cast
an
artifact
creature
spell,
it
gains
sunburst.
(It
enters
with
a
+1/+1
counter
on
it
for
each
color
of
mana
spent
to
cast
it.)
At
the
beginning
of
your
end
step,
if
there
are
thirty
or
more
counters
among
artifacts
and
creatures
you
control,
this
artifact
deals
10
damage
to
each
opponent.
