Tezzeret the Seeker [Duel Decks: Elspeth vs. Tezzeret]

+1: Untap up to two target artifacts.
−X: Search your library for an artifact card with converted mana cost X or less and put it onto the battlefield. Then shuffle your library.
−5: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn.