Cheapest priced copy (The List): $4.49 at Card Kingdom, near mint, their price list as of .
Pernicious Deed 
Enchantment · Rare · Apocalypse · #114
{X}, Sacrifice this enchantment: Destroy each artifact, creature, and enchantment with mana value X or less.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
6 printings · $4.49 to $449.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Masters 25 | 212 | Rare | $5.99 | $10.99Out of stock |
| Apocalypse | 114 | Rare | $24.99 | $449.99 |
| Conspiracy | 191 | Mythic | $6.99 | $24.99Out of stock |
| Judge Gift Cards 2006 | 4 | Rare | — | $59.99 |
| The List | A25-212 | Rare | $4.49 | — |
| Secret Lair Drop | 1777 | Rare | $6.49 | $6.99 |
2 rulings from Wizards of the Coast
- 16 March 2018If a permanent has {X} in its mana cost, X is considered to be 0.
- 16 March 2018A token has a mana value of 0 unless it is copying something else.