Cheapest priced copy (Nemesis): $4.99 at Card Kingdom, near mint, their price list as of .
Rootwater Thief 
Creature — Merfolk Rogue · 1/2 · Rare · Nemesis · #40
{U}: This creature gains flying until end of turn.
Whenever this creature deals combat damage to a player, you may pay {2}. If you do, search that player's library for a card and exile it, then the player shuffles.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $4.99 to $54.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Nemesis | 40 | Rare | $4.99 | $54.99 |