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 - $7.000
Lightly Played - $5.600
Moderately Played - $4.900
Heavily Played - $4.200
Damaged - $3.500
Near Mint Spanish - $7.000
Lightly Played Spanish - $5.600
Moderately Played Spanish - $4.900
Heavily Played Spanish - $4.200
Damaged Spanish - $3.500
Foil Prices
Near Mint Foil - $20.800
Lightly Played Foil - $16.700
Moderately Played Foil - $14.600
Heavily Played Foil - $12.500
Damaged Foil - $10.400
Near Mint Foil Spanish - $20.800
Lightly Played Foil Spanish - $16.700
Moderately Played Foil Spanish - $14.600
Heavily Played Foil Spanish - $12.500
Damaged Foil Spanish - $10.400