Cheapest priced copy (Urza's Saga): $0.49 at Card Kingdom, near mint, their price list as of .
Greener Pastures 
Enchantment · Rare · Urza's Saga · #258
At the beginning of each player's upkeep, if that player controls more lands than each other player, the player creates a 1/1 green Saproling creature token.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Urza's Saga | 258 | Rare | $0.49 | — |
One ruling from Wizards of the Coast
- 4 October 2004The ability does not trigger unless the player has more lands at the beginning of upkeep. This is checked again on resolution, and if the player does not still have more lands, no token is generated.