When Chthonian Nightmare enters the battlefield, you get EEE.
Pay X E, Sacrifice a creature, Return Cthonian Nightmare to its owner's hand: Return target creature card with mana value X from your graveyard to the battlefield. Activate only as a sorcery.
Near Mint - $6.000
Lightly Played - $4.800
Moderately Played - $4.200
Heavily Played - $3.600
Damaged - $3.000
Near Mint Spanish - $6.000
Lightly Played Spanish - $4.800
Moderately Played Spanish - $4.200
Heavily Played Spanish - $3.600
Damaged Spanish - $3.000
Foil Prices
Near Mint Foil - $19.800
Lightly Played Foil - $15.900
Moderately Played Foil - $13.900
Heavily Played Foil - $11.900
Damaged Foil - $9.900
Near Mint Foil Spanish - $19.800
Lightly Played Foil Spanish - $15.900
Moderately Played Foil Spanish - $13.900
Heavily Played Foil Spanish - $11.900
Damaged Foil Spanish - $9.900