Solar Transformer is a uncommon Artifact card from Modern Horizons 3 (MH3), collector number 211. Current market price: $0.27 (foil $0.31), TCGplayer market prices via Scryfall.
This artifact enters tapped. When this artifact enters, you get {E}{E}{E} (three energy counters). {T}: Add {C}. {T}, Pay {E}: Add one mana of any color.