Cheapest priced copy (Saviors of Kamigawa): $0.35 at Card Kingdom, near mint, their price list as of .
Deathmask Nezumi 
Creature — Rat Shaman · 2/2 · Common · Saviors of Kamigawa · #66
As long as you have seven or more cards in hand, this creature gets +2/+1 and has fear. (It can't be blocked except by artifact creatures and/or black creatures.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Saviors of Kamigawa | 66 | Common | $0.35 | $0.49 |