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As long as Cessation Crystal is attached to an Active Pokémon, each player's Pokémon (both yours and your opponent's) can't use any Poké-Powers or Poké-Bodies.
Card rule
Attach Cessation Crystal to 1 of your Pokémon (excluding Pokémon-ex) that doesn't already have a Pokémon Tool attached to it. If the Pokémon Cessation Crystal is attached to is a Pokémon-ex, discard this card.
