Quad Stone has been revealed from the Japanese set Paradigm Trigger, which releases in Japan on October 21st. We should see most of the cards from this set become part of our Silver Tempest in November.
You may use 4 Quad Stone cards at once.
– If you used 1 card, heal 10 damage from your Active Pokemon.
– If you used 4 cards, heal all damage from each of your Pokemon. (This effect works one time for 4 cards.)
You may play any number of Item cards during your turn.