Cheapest priced copy (Mirrodin Besieged): $0.99 at Card Kingdom, near mint, their price list as of .
Red Sun's Zenith 
Sorcery · Rare · Mirrodin Besieged · #74
Red Sun's Zenith deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead. Shuffle Red Sun's Zenith into its owner's library.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.99 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin Besieged | 74 | Rare | $0.99 | $3.49 |
One ruling from Wizards of the Coast
- 1 June 2011If this spell doesn’t resolve, none of its effects occur. In particular, it will go to the graveyard rather than to its owner’s library.