Cheapest priced copy (Urza's Destiny): $0.99 at Card Kingdom, near mint, their price list as of .
Tethered Griffin 
Creature — Griffin · 2/3 · Rare · Urza's Destiny · #21
Flying
When you control no enchantments, sacrifice this creature.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.99 to $54.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Urza's Destiny | 21 | Rare | $0.99 | $54.99 |
2 rulings from Wizards of the Coast
- 4 October 2004Only checks if you control no enchantments at the time it triggers. It does not check again on resolution. Gaining control of an enchantment before then will not save the Griffin.
- 4 October 2004The ability will trigger if you don’t control an enchantment, even for a brief moment during the resolution of another spell or ability.