Myr Galvanizer is a uncommon Artifact Creature — Myr card from Scars of Mirrodin (SOM), collector number 181. Current market price: $0.96 (foil $7.73), TCGplayer market prices via Scryfall.
Other Myr creatures you control get +1/+1. {1}, {T}: Untap each other Myr you control.