Putrid Imp is a common Creature — Zombie Imp card from Torment (TOR), collector number 77. Current market price: $1.53 (foil $32.49), TCGplayer market prices via Scryfall.
Discard a card: This creature gains flying until end of turn. Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1 and can't block.