Cheapest priced copy (Alara Reborn): $0.35 at Card Kingdom, near mint, their price list as of .
Ethersworn Shieldmage 
Artifact Creature — Vedalken Wizard · 2/2 · Common · Alara Reborn · #4
Flash
When this creature enters, prevent all damage that would be dealt to artifact creatures this turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Alara Reborn | 4 | Common | $0.35 | $0.49 |
| Archenemy | 84 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 1 May 2009When Ethersworn Shieldmage’s triggered ability resolves, it doesn’t lock in which permanents will be affected. For the rest of the turn, any time damage would be dealt to a permanent, check whether it’s an artifact creature at that time. If it is, that damage is prevented.