Darkness Energy

Darkness Energy from Power Keepers (2007) is a special energy card that provides Dark-type energy while also inflicting damage on the Pokémon it's attached to. As a functional reprint of a mechanic introduced in earlier sets, it appeals primarily to players rather than collectors, with limited premium demand compared to more iconic cards from the set. Current pricing at bulk levels reflects its abundant supply and modest collector interest typical of utility cards from mid-2000s expansions.