Mistaken Accusation (MP16-EN222) - 2016 Mega-Tins Mega Pack Unlimited

If your opponent has more total cards in their hand and their side of the field than you do: Target 1 face-up card on the field; neither player can activate cards with that name, or their effects, for the rest of this Duel, except that target. You can only activate 1 "Mistaken Accusation" per turn.