Cheapest priced copy (Nemesis): $0.35 at Card Kingdom, near mint, their price list as of .
Lashknife 
Enchantment — Aura · Common · Nemesis · #9
If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost.
Enchant creature
Enchanted creature has first strike.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Nemesis | 9 | Common | $0.35 | $6.99 |