Ancient Crystal (Ultra Prism 118/156)

Rules

Attach a Pokémon Tool to 1 of your Pokémon that doesn't already have a Pokémon Tool attached to it.

The Regirock, Regice, Registeel, or Regigigas this card is attached to takes 30 less damage from your opponent's attacks (after applying Weakness and Resistance).

You may play as many Item cards as you like during your turn (before your attack).