Cheapest priced copy (Rise of the Eldrazi): $0.35 at Card Kingdom, near mint, their price list as of .
Luminous Wake 
Enchantment — Aura · Uncommon · Rise of the Eldrazi · #35
Enchant creature
Whenever enchanted creature attacks or blocks, you gain 4 life.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Rise of the Eldrazi | 35 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 15 June 2010When the enchanted creature blocks, Luminous Wake’s ability triggers just once, even if that creature somehow blocked multiple attacking creatures.
- 15 June 2010The controller of Luminous Wake (who is not necessarily the controller of the enchanted creature) controls the triggered ability and gains life when it resolves. In other words, if you enchant your opponent’s creature with Luminous Wake, you — not your opponent — gain life whenever that creature attacks or blocks.