Darkness Energy
If the Pokémon 
Energy is attached to damages the Defending Pokémon (after applying Weakness and Resistance), the attack does 10 more damage to the Defending Pokémon. At the end of every turn, put 1 damage counter on the Pokémon Energy is attached to, unless it's or has Dark in its name. Energy provides Energy. (Doesn't count as a basic Energy card.)
Energy is attached to damages the Defending Pokémon (after applying Weakness and Resistance), the attack does 10 more damage to the Defending Pokémon. At the end of every turn, put 1 damage counter on the Pokémon Energy is attached to, unless it's or has Dark in its name. Energy provides Energy. (Doesn't count as a basic Energy card.)