Cheapest priced copy (Mirage): $2.79 at Card Kingdom, near mint, their price list as of .
Natural Balance 
Sorcery · Rare · Mirage · #231
Each player who controls six or more lands chooses five lands they control and sacrifices the rest. Each player who controls four or fewer lands may search their library for up to X basic land cards and put them onto the battlefield, where X is five minus the number of lands they control. Then each player who searched their library this way shuffles.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $2.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirage | 231 | Rare | $2.79 | — |
| Oversized League Prizes | 71 | Rare | — | — |
| Oversized League Prizes | 72 | Rare | — | — |
One ruling from Wizards of the Coast
- 4 October 2004You are not required to find all the basic lands you are entitled to.