Cheapest priced copy (Nemesis): $0.35 at Card Kingdom, near mint, their price list as of .
Parallax Dementia 
Enchantment — Aura · Common · Media and Collaboration Promos · #2000-6
Enchant creature
Fading 1 (This enchantment enters with one fade counter on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
Enchanted creature gets +3/+2.
When this Aura leaves the battlefield, destroy enchanted creature. That creature can't be regenerated.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
2 printings · $0.35 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Nemesis | 62 | Common | $0.35 | $2.49 |
| Media and Collaboration Promos | 2000-6 | Common | — | — |