Cheapest priced copy (Time Spiral Timeshifted): $0.35 at Card Kingdom, near mint, their price list as of .
Gaea's Liege 
Creature — Avatar · */* · Rare · 30th Anniversary Edition · #192
As long as Gaea's Liege isn't attacking, its power and toughness are each equal to the number of Forests you control. As long as Gaea's Liege is attacking, its power and toughness are each equal to the number of Forests defending player controls.
{T}: Target land becomes a Forest until this creature leaves the battlefield.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
14 printings · $0.35 to $649.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Unlimited Edition | 197 | Rare | $23.99 | — |
| 30th Anniversary Edition | 192 | Rare | $23.99 | — |
| 30th Anniversary Edition | 489 | Rare | $129.99 | — |
| Revised Edition | 198 | Rare | $0.49 | — |
| Fourth Edition Foreign Black Border | 247 | Rare | — | — |
| Fourth Edition | 247 | Rare | $0.49 | — |
| Collectors' Edition | 197 | Rare | $5.99 | — |
| Intl. Collectors' Edition | 197 | Rare | $7.49 | — |
| Foreign Black Border | 198 | Rare | — | — |
| Limited Edition Alpha | 196 | Rare | $649.99 | — |
| Limited Edition Beta | 197 | Rare | $199.99Out of stock | — |
| Wizards Play Network 2024 | 5 | Rare | — | $0.99 |
| Summer Magic / Edgar | 198 | Rare | — | — |
| Time Spiral Timeshifted | 78 | Special | $0.35 | $2.99 |
3 rulings from Wizards of the Coast
- 4 October 2004When being declared as an attacker, use the "not attacking" power and toughness. It only changes after declaration is complete.
- 25 September 2006The activated ability doesn't affect whether the land is basic or not. It overwrites any other land types. Being a Forest gives the affected land the ability "{T}: Add {G}."
- 15 October 2006Will not add or remove the supertype snow to or from a land.