Cheapest priced copy (Dark Ascension): $0.35 at Card Kingdom, near mint, their price list as of .
Chant of the Skifsang 
Enchantment — Aura · Common · Dark Ascension · #31
Enchant creature
Enchanted creature gets -13/-0.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dark Ascension | 31 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 22 January 2011A creature with power 0 or less assigns no combat damage. (It doesn’t assign a negative amount of combat damage.)