Cheapest priced copy (Urza's Legacy): $0.35 at Card Kingdom, near mint, their price list as of .
Rank and File 
Creature — Zombie · 3/3 · Uncommon · Urza's Legacy · #65
When this creature enters, green creatures get -1/-1 until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Urza's Legacy | 65 | Uncommon | $0.35 | $1.99 |
One ruling from Wizards of the Coast
- 4 October 2004The -1/-1 penalty is given to all green creatures on the battlefield when the triggered ability resolves. It will not apply to green creatures that enter later in the turn.