Rally the Peasants is a uncommon Instant card from Ultimate Masters (UMA), collector number 28. Current market price: $0.19 (foil $0.33), 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.)