Dream Trawler is a rare Creature — Sphinx card from Theros Beyond Death Promos (PTHB), collector number 214p. Current market price: $0.37 (foil $0.72), TCGplayer market prices via Scryfall.
Flying, lifelink Whenever you draw a card, this creature gets +1/+0 until end of turn. Whenever this creature attacks, draw a card. Discard a card: This creature gains hexproof until end of turn. Tap it.