Majority Vendor: Ebay

At the begging of your upkeep, if you
control three or more artifacts, you gain 1 life.
{t}: Add {c} to your mana pool.
{4},{t}, Sacrifice Inventors' Fair: Search your
library for an artifact card, reveal it, put it into
your hand, the shuffle your library. Activate
this ability only if you control three or more
artifacts.