Zosa, Curio Dealer

Whenever you draw one or more cards, you
may reveal an artifact from among them. If
you do, choose one; Artifact spells cast can't
be countered this turn, or artifact spells cost
{1} less to cast until end of turn.
{5}: You and target opponent choose an
artifact you don't control, then exchange
control of those two permanents. Untap
them.