If the Pokemon Darkness Energy is attached to attacks, the attack does 10 more damage to the Active Pokemon (before applying Weakness and Resistance). Ignore this effect unless the Attacking Pokemon is D or has Dark in its name. Darkness Energy provides D Energy. (Doesn't count as a basic Energy card.)
Near Mint - $0.50
Lightly Played - $0.50
Moderately Played - $0.40
Heavily Played - $0.40
Damaged - $0.30
Near Mint Reverse Holofoil - $12.60
Lightly Played Reverse Holofoil - $11.90
Moderately Played Reverse Holofoil - $10.50
Heavily Played Reverse Holofoil - $9.10
Damaged Reverse Holofoil - $7.00