It exists in several finishes (Normal, Reverse holo). Each one has its own price; the average above is for the regular version.
Artwork by Kazuaki Aihara. Some collectors chase every card by the same artist: how to start (in Spanish).
Abilities
? Poke-POWER
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.
Attacks
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Hidden Power
Discard up to 2 cards from your hand. For each card you discarded, draw a card.
Flavour text
Shaped like ancient writing, it is a huge mystery whether language or Unown came first.