Cheapest priced copy (Duskmourn: House of Horror): $0.35 at Card Kingdom, near mint, their price list as of .
Oblivious Bookworm 
Creature — Human Wizard · 2/3 · Uncommon · Duskmourn: House of Horror · #300
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.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duskmourn: House of Horror | 225 | Uncommon | $0.35 | $0.49 |
| Duskmourn: House of Horror | 300 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 20 September 2024Once Oblivious Bookworm's ability begins to resolve, it's too late to put any permanents onto the battlefield face down under your control or turn any permanents face up to prevent yourself from having to discard a card if you choose to draw a card.