Cheapest priced copy (Lorwyn): $0.35 at Card Kingdom, near mint, their price list as of .
Adder-Staff Boggart 
Creature — Goblin Warrior · 2/1 · Common · Lorwyn · #148
When this creature enters, clash with an opponent. If you win, put a +1/+1 counter on this creature. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Lorwyn | 148 | Common | $0.35 | $0.49 |