Cheapest priced copy (Conflux): $0.35 at Card Kingdom, near mint, their price list as of .
Brackwater Elemental 
Creature — Elemental · 4/4 · Common · Duel Decks: Ajani vs. Nicol Bolas · #46
When this creature attacks or blocks, sacrifice it at the beginning of the next end step.
Unearth {2}{U} ({2}{U}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conflux | 21 | Common | $0.35 | $0.49 |
| Duel Decks: Ajani vs. Nicol Bolas | 46 | Common | $0.35 | — |