Oblivious Bookworm is a uncommon Creature — Human Wizard card from Duskmourn: House of Horror (DSK), collector number 225. Current market price: $0.22 (foil $0.32), TCGplayer market prices via Scryfall.
At the beginning of your end step, you may draw a card. If you do, discard a card unless a permanent entered the battlefield face down under your control this turn or you turned a permanent face up this turn.