Cybernetic Overflow

Exile any number of artifact Dragons from your
hand, battlefield, or graveyard, then destroy up
to X permanents, where X is the number of cards
you exiled this way. If a spell or ability is added
to the stack while this card remains on the stack,
you may search your library for a colorless
non-creature non-land card, add it to your hand,
then shuffle your library.