Cheapest priced copy (New Phyrexia): $0.35 at Card Kingdom, near mint, their price list as of .
Numbing Dose 
Enchantment — Aura · Common · New Phyrexia · #40
Enchant artifact or creature
Enchanted permanent doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted permanent's controller, that player loses 1 life.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Phyrexia | 40 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 June 2011Numbing Dose may target and may enchant an untapped artifact or creature.