Tezzeret, Betrayer of Flesh

The first activated ability of an artifact you activate each turn costs 2 less to activate. [+1]: Draw two cards. Then discard two cards unless you discard an artifact card. [-2]: Target artifact becomes an artifact creature. If it isn't a Vehicle, it has base power and toughness 4/4. [-6]: You get an emblem with "Whenever an artifact you control becomes tapped, draw a card."