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 - $6.70
Lightly Played - $5.40
Moderately Played - $4.70
Heavily Played - $4.10
Damaged - $3.40
Near Mint Spanish - $6.70
Lightly Played Spanish - $5.40
Moderately Played Spanish - $4.70
Heavily Played Spanish - $4.10
Damaged Spanish - $3.40
Foil Prices
Near Mint Foil - $20.80
Lightly Played Foil - $16.70
Moderately Played Foil - $14.60
Heavily Played Foil - $12.50
Damaged Foil - $10.40
Near Mint Foil Spanish - $20.80
Lightly Played Foil Spanish - $16.70
Moderately Played Foil Spanish - $14.60
Heavily Played Foil Spanish - $12.50
Damaged Foil Spanish - $10.40