Sorcery
Sacrifice
an
artifact.
If
you
do,
search
your
library
for
an
artifact
card.
If
that
card's
mana
value
is
less
than
or
equal
to
the
sacrificed
artifact's
mana
value,
put
it
onto
the
battlefield.
If
it's
greater,
you
may
pay
,
where
X
is
the
difference.
If
you
do,
put
it
onto
the
battlefield.
If
you
don't,
put
it
into
its
owner's
graveyard.
Then
shuffle.