Rom, Ferengi Savant

When Rom, Ferengi Savant enters the battlefield,
you may search your library for an artifact card,
put it into your graveyard, then shuffle.
{r}, {t}, Sacrifice an artifact: Return target artifact
card with mana value 3 or less from your
graveyard to the battlefield.
—
"Is there something wrong, Chief? I can work slower
if you want me to."