Cheapest priced copy (Duskmourn: House of Horror): $0.35 at Card Kingdom, near mint, their price list as of .
Creeping Peeper 
Creature — Eye · 2/1 · Common · Duskmourn: House of Horror · #46
{T}: Add {U}. Spend this mana only to cast an enchantment spell, unlock a door, or turn a permanent face up.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duskmourn: House of Horror | 46 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 20 September 2024Mana produced by Creeping Peeper's activated ability can be used to pay morph or disguise costs when turning a face-down permanent face up or to pay costs associated with turning a manifested or cloaked permanent face up.