March of Progress is a rare Sorcery card from The Brothers' War Commander (BRC), collector number 8. Current market price: $1.47, TCGplayer market prices via Scryfall.
Choose target artifact creature you control. For each creature chosen this way, create a token that's a copy of it. Overload {6}{U} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")