Cheapest priced copy (Mirage): $1.79 at Card Kingdom, near mint, their price list as of .
Wellspring 
Enchantment — Aura · Rare · Mirage · #288
Enchant land
When this Aura enters, gain control of enchanted land until end of turn.
At the beginning of your upkeep, untap enchanted land. You gain control of that land until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $1.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirage | 288 | Rare | $1.79 | — |
One ruling from Wizards of the Coast
- 4 October 2004If Wellspring leaves the battlefield, the control effect still lasts until end of turn.