Thraben Doomsayer is a rare Creature — Human Cleric card from Dark Ascension (DKA), collector number 25. Current market price: $0.33 (foil $1.04), TCGplayer market prices via Scryfall.
{T}: Create a 1/1 white Human creature token. Fateful hour — As long as you have 5 or less life, other creatures you control get +2/+2.