Cheapest priced copy (Eldritch Moon): $0.99 at Card Kingdom, near mint, their price list as of .
Eternal Scourge 
Creature — Eldrazi Horror · 3/3 · Rare · Eldritch Moon · #7
You may cast this card from exile.
When this creature becomes the target of a spell or ability an opponent controls, exile this creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.99 to $19.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eldritch Moon | 7 | Rare | $0.99 | $11.99 |
| Eldritch Moon Promos | 7s | Rare | — | $19.99 |
3 rulings from Wizards of the Coast
- 13 July 2016Eternal Scourge's triggered ability only triggers while it's on the battlefield. For example, Convolute cast targeting Eternal Scourge won't cause its ability to trigger.
- 13 July 2016You'll exile Eternal Scourge even if the spell or ability that targets it is countered.
- 13 July 2016You must follow the normal timing permissions and restrictions and pay its cost to cast Eternal Scourge from exile.