Cheapest priced copy (Secrets of Strixhaven): $0.35 at Card Kingdom, near mint, their price list as of .
Biblioplex Tomekeeper 
Artifact Creature — Construct · 3/4 · Common · Secrets of Strixhaven · #247
When this creature enters, choose up to one —
• Target creature becomes prepared. (Only creatures with prepare spells can become prepared.)
• Target creature becomes unprepared.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secrets of Strixhaven | 247 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 20 March 2026The first mode of Biblioplex Tomekeeper's last ability won't have any effect on a creature that has no prepare spell or is already prepared. Similarly, the second mode won't have any effect on a creature that isn't already prepared.