Tezzeret, Betrayer of Flesh
Legendary Planeswalker — Tezzeret
The first activated ability of an artifact you activate each turn costs
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."
Tezzeret, Betrayer of Flesh's first ability reduces the cost of the first activated ability of an artifact that you begin to activate each turn. The second ability (and any subsequent abilities) of an artifact you activate that turn won't cost less to activate, even if the first ability you activated didn't cost any mana to begin with. Notably, this does not exclude mana abilities.