Incendiary Dissent is a common Conspiracy card from Conspiracy: Take the Crown (CN2), collector number 8. Current market price: $0.04 (foil $0.38), TCGplayer market prices via Scryfall.
Hidden agenda (Start the game with this conspiracy face down in the command zone and secretly choose a card name. You may turn this conspiracy face up any time and reveal that name.) Creatures you control with the chosen name have "{R}: This creature gets +1/+0 until end of turn."