Mischief of the Gnomes (SR03-EN034) - Structure Deck: Machine Reactor Unlimited

This turn, reduce the Levels of all monsters in each player's hand by 1 (even after they are Summoned/Set). You can banish this card from the Graveyard; this turn, reduce the Levels of all monsters in each player's hand by 1 (even after they are Summoned/Set).