Magic Hand (DLCS-EN047) - Dragons of Legend: The Complete Series 1st Edition

When your opponent adds a card(s) from their Deck to their hand, except by drawing them (except during the Damage Step): You can send that card(s) to the Graveyard, and if you do, inflict 800 damage to your opponent. This effect can only be used once while this card is face-up on the field.