Blightspeaker is a common Creature — Human Rebel Cleric card from Modern Masters (MMA), collector number 73. Current market price: $0.09 (foil $0.34), TCGplayer market prices via Scryfall.
{T}: Target player loses 1 life. {4}, {T}: Search your library for a Rebel permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.