Cheapest priced copy (Duel Decks: Speed vs. Cunning): $0.35 at Card Kingdom, near mint, their price list as of .
Echo Tracer 
Creature — Human Wizard · 2/2 · Common · Duel Decks: Speed vs. Cunning · #51
Morph {2}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When this creature is turned face up, return target creature to its owner's hand.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Speed vs. Cunning | 51 | Common | $0.35 | — |
| Legions | 37 | Common | $0.35 | $0.99 |
| The List | LGN-37 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 4 October 2004The trigger occurs when you use the Morph ability to turn the card face up, or when an effect turns it face up. It will not trigger on being revealed or on leaving the battlefield.