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 - $2.75
Lightly Played - $2.50
Moderately Played - $2.25
Heavily Played - $1.75
Damaged - $1.50
Near Mint Non-English - $2.75
Lightly Played Non-English - $2.50
Moderately Played Non-English - $2.25
Heavily Played Non-English - $1.75
Damaged Non-English - $1.50
Foil Prices
Near Mint Foil - $4.25
Lightly Played Foil - $4.00
Moderately Played Foil - $3.50
Heavily Played Foil - $2.50
Damaged Foil - $2.25
Near Mint Foil Non-English - $4.25
Lightly Played Foil Non-English - $4.00
Moderately Played Foil Non-English - $3.50
Heavily Played Foil Non-English - $2.50
Damaged Foil Non-English - $2.25