Zone, Engine Maker

+1: Create a 1/1 White Engineer creature token with "{1}, Sacrifice this creature then search your library for an artifact with mana cost 1 or less."
-2: You pay life to cast artifacts instead of their mana cost, where you pay life equal to that cards mana cost minus 1.
-7: You may reveal the top 10 cards of your library, then put 2 artifacts with mana cost 7 or less onto your battlefield tapped, then shuffle.