Nailsmith

When Nailsmith comes into play, sacrifice an
artifact or bury Nailsmith.
{x}, {t}: Search your library for a Nail with a
mana cost of {x}, shuffle your library, and put
the Nail on top. If the artifact you sacrificed
was also a Nail, put the new Nail into your
hand instead.
"Anything can be refined with enough effort and skill,
even that broken blade."