Cheapest priced copy (Guildpact): $0.49 at Card Kingdom, near mint, their price list as of .
Sky Swallower 
Creature — Leviathan · 8/8 · Rare · Guildpact · #34
Flying
When this creature enters, target opponent gains control of all other permanents you control.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guildpact | 34 | Rare | $0.49 | $1.99 |
2 rulings from Wizards of the Coast
- 1 February 2006Auras your opponent gains control of won't move from where they are.
- 1 February 2006The permanents don't return to your control when Sky Swallower leaves the battlefield.