Legendary Planeswalker — Tezzeret
+1 : Create a colorless artifact token named Etherium Cell with "

, Sacrifice this token: Add one mana of any color."
−2 : Target creature gets +X/-X until end of turn, where X is the number of artifacts you control.
−7 : You get an emblem with "At the beginning of combat on your turn, target artifact you control becomes an artifact creature with base power and toughness 5/5."
A Vehicle targeted by the emblem's ability becomes a 5/5 creature. Crewing it won't change its power and toughness.