Ornn, Fire Below the Mountain

Vigilance, Endure 2 (At the beginning of your
end step, if a source controlled by an opponent dealt
damage to this creature this turn, put 2 +1/+1
counters on it.)
{x}, {t}: Search your library for an artifact card
with mana value X or less, reveal it, and put it
onto the battlefield tapped and under your
control. Then shuffle your library. X cannot by greater than Ornn, Fire Below the Mountain's
power.