Once during your turn (before your attack), if Unown ? is on your Bench, you may choose a Pokémon in your hand and put it face down. Your opponent guesses a type of that Pokémon. Reveal that card. If your opponent guessed wrong, draw a card. Then, put that card back into your hand.

Hidden Power

Discard up to 2 cards from your hand. For each card you discarded, draw a card.

Shaped like ancient writing, it is a huge mystery whether language or Unown came first.