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 - $5.50
Lightly Played - $5.25
Moderately Played - $4.50
Heavily Played - $3.25
Damaged - $2.75
Near Mint Non-English - $5.50
Lightly Played Non-English - $5.25
Moderately Played Non-English - $4.50
Heavily Played Non-English - $3.25
Damaged Non-English - $2.75
Foil Prices
Near Mint Foil - $14.50
Lightly Played Foil - $13.75
Moderately Played Foil - $11.50
Heavily Played Foil - $8.75
Damaged Foil - $7.25
Near Mint Foil Non-English - $14.50
Lightly Played Foil Non-English - $13.75
Moderately Played Foil Non-English - $11.50
Heavily Played Foil Non-English - $8.75
Damaged Foil Non-English - $7.25