Cheapest priced copy (Mirrodin): $0.35 at Card Kingdom, near mint, their price list as of .
Slith Predator 
Creature — Slith · 1/1 · Uncommon · Mirrodin · #129
Trample
Whenever this creature deals combat damage to a player, put a +1/+1 counter on it.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 129 | Uncommon | $0.35 | $0.49 |