Cheapest priced copy (Foundations): $0.35 at Card Kingdom, near mint, their price list as of .
Mild-Mannered Librarian 
Creature — Human · 1/1 · Uncommon · Foundations · #228
{3}{G}: This creature becomes a Werewolf. Put two +1/+1 counters on it and you draw a card. Activate only once.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations | 228 | Uncommon | $0.35 | $0.49 |
| Jumpstart 2022 | 41 | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 2 December 2022As Mild-Mannered Librarian's last ability resolves, it loses its other creature types and becomes a Werewolf. It's no longer a Human.