Cheapest priced copy (Homelands): $0.79 at Card Kingdom, near mint, their price list as of .
Mystic Decree 
World Enchantment · Rare · Homelands · #34
All creatures lose flying and islandwalk.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Homelands | 34 | Rare | $0.79 | — |
One ruling from Wizards of the Coast
- 1 October 2008This has the supertype world. When a world permanent enters, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter at the same time, they're both put into their owners' graveyards.