Deepcavern Imp is a common Creature — Imp Rebel card from Future Sight (FUT), collector number 83. Current market price: $0.15 (foil $0.36), TCGplayer market prices via Scryfall.
Flying, haste Echo—Discard a card. (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)