Tezzeret the Schemer

: Create a colorless artifact token named Etherium Cell with ", Sacrifice this token: Add one mana of any color."

: Target creature gets +X/−X until end of turn, where X is the number of artifacts you control.

: 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."