When Chthonian Nightmare enters the battlefield, you get EEE (three energy counters).
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 - $3.25
Lightly Played - $3.00
Moderately Played - $2.50
Heavily Played - $2.00
Damaged - $1.75
Near Mint Non-English - $3.25
Lightly Played Non-English - $3.00
Moderately Played Non-English - $2.50
Heavily Played Non-English - $2.00
Damaged Non-English - $1.75
Foil Prices
Near Mint Foil - $3.25
Lightly Played Foil - $3.00
Moderately Played Foil - $2.75
Heavily Played Foil - $2.00
Damaged Foil - $1.75
Near Mint Foil Non-English - $3.25
Lightly Played Foil Non-English - $3.00
Moderately Played Foil Non-English - $2.75
Heavily Played Foil Non-English - $2.00
Damaged Foil Non-English - $1.75