Cheapest priced copy (Lorwyn Eclipsed Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Puca's Covenant 
Enchantment · Rare · Lorwyn Eclipsed Commander · #18
Whenever a creature you control with a counter on it dies, you may return another target permanent card with mana value less than or equal to the number of counters on that creature from your graveyard to your hand. Do this only once each turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Lorwyn Eclipsed Commander | 18 | Rare | $0.49 | — |
| Lorwyn Eclipsed Commander | 38 | Rare | $0.49 | — |
One ruling from Wizards of the Coast
- 17 November 2025If a permanent card in a graveyard has {X} in its mana cost, X is 0 for the purpose of determining its mana value.