Burrenton Clachan

At the beginning of your upkeep, if you
control three or more artifacts, you gain 1 life.
{t}: Add {c} to your mana pool.
{4}, {t}, Sacrifice Burrenton Clachan: Search
your library for an artifact card, reveal it, put
it into your hand, then shuffle your library.
Activate this ability only if you control three
or more artifacts.