Tezzeret the Seeker
Modern Masters 2015 Edition — Mythic
Planeswalker — 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.