Unown [O] (Neo Discovery 69/75)

Rules

You may have up to 4 Basic Pokémon cards in your deck with Unown in their names.

Abilities

Once during your turn (before your attack), you may look at 5 cards from the top of your opponent's deck and put them back in the same order.

Attacks

Their shapes look like hieroglyphs on ancient tablets. It is said that the two are somehow related.