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 - $1.10
Lightly Played - $1.00
Played - $0.80
Heavily Played - $0.70
Damaged - $0.60
Near Mint Non-English - $1.10
Lightly Played Non-English - $1.00
Played Non-English - $0.80
Heavily Played Non-English - $0.70
Damaged Non-English - $0.60
Foil Prices
Near Mint Foil - $2.00
Lightly Played Foil - $1.80
Played Foil - $1.40
Heavily Played Foil - $1.20
Damaged Foil - $1.00
Near Mint Foil Non-English - $2.00
Lightly Played Foil Non-English - $1.80
Played Foil Non-English - $1.40
Heavily Played Foil Non-English - $1.20
Damaged Foil Non-English - $1.00