You can't have more than 1 ACE SPEC card in your deck. When the Tera Pokémon this card is attached to uses an attack, that attack costs 1 Energy less. (The Energy can be of any type.) You may attach any number of Pokémon Tools to your Pokémon during your turn. You may attach only 1 Pokémon Tool to each Pokémon, and it stays attached.