Unown [U] (Neo Discovery 51/75)
0

Once during your turn (before you 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.

Psychic
Hidden Power
10
Card rule

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