Crystal Shard (EX Crystal Guardians 76/100)

As long as Crystal Shard is attached to a Pokémon, that Pokémon's type is Colorless. If that Pokémon attacks, discard this card at the end of the turn.

Card rule

Attach Crystal Shard to 1 of your Pokémon that doesn't already have a Pokémon Tool attached to it. If that Pokémon is Knocked Out, discard this card.