Pym, Courier

If Pym, Courier is your commander, you may
search your deck for a legendary artifact before
the game begins, exile it, then shuffle your deck.
Pym, Courier is the color(s) of the exiled card.
As an additional cost to cast this spell, pay the
mana value of the exiled card.
You may have Pym, Courier enters as a copy of
the exiled card. Except it is an artifact creature
with power/toughness 0/1.