Rally the Peasants is a common Instant card from Eternal Masters (EMA), collector number 25. Current market price: $0.21 (foil $0.18), TCGplayer market prices via Scryfall.
Creatures you control get +2/+0 until end of turn. Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)