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 - $7.00
Lightly Played - $6.50
Moderately Played - $5.50
Heavily Played - $4.25
Damaged - $3.50
Near Mint Non-English - $7.00
Lightly Played Non-English - $6.50
Moderately Played Non-English - $5.50
Heavily Played Non-English - $4.25
Damaged Non-English - $3.50
Foil Prices
Near Mint Foil - $15.50
Lightly Played Foil - $14.75
Moderately Played Foil - $12.50
Heavily Played Foil - $9.50
Damaged Foil - $7.75
Near Mint Foil Non-English - $15.50
Lightly Played Foil Non-English - $14.75
Moderately Played Foil Non-English - $12.50
Heavily Played Foil Non-English - $9.50
Damaged Foil Non-English - $7.75