![Unown [U]](/_next/image?url=https%3A%2F%2Fimages.pokemontcg.io%2Fneo2%2F51_hires.png&w=1080&q=75)
Once during your turn (before your attack), if you have Unown [U], Unown [N], Unown [D], and Unown [O] on your Bench, you may return your Active Pokémon and all cards attached to it to your hand.
You may have up to 4 Basic Pokémon cards in your deck with Unown in their names.
Their shapes look like hieroglyphs on ancient tablets. It is said that the two are somehow related.