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.
Creates lockdown for your opponents on certain key cards.
Your opponent needs to have more cards in total (Hand and Field) compared to you, in order for you to activate.
If you use Mistaken Accusation on your opponent’s monster to disable the same Name and Type of that monster, you can still use cards like Tribute of the Doom, or Dark Core, to remove that monster from the Field to completely disable your opponent from using that monster throughout the Duel.
You can even use Mistaken Accusation on you opponent’s monster first, then return it to your opponent’s Hand or Deck. They cannot use that monster for the rest of the Duel.
These are some examples of key cards you can use Mistaken Accusation on. Since Mistaken Accusation is a Quick-Play Spell that can be set, you can use during your opponent’s turn when they use any of Amazoness Onslaught, Mask Change, Spellbook of Fate, Spellbook of Eternity (They are considered face-up cards once your opponent activates it) As for Wiz, Sage Fur Hire and Mayhem Fur Hire, you may face some challenge as Wiz can negate your Mistaken Arrest for one time, so you need to bait them to use their negation before you use Mistaken Accusation.
I actually find myself unable to use this card, because I never seem to be at a card disadvantage during the right moment. But this card has the potential of ruining someone's deck completely, it might work better if you're using a deck that often puts you at card disadvantage.
i once kill spellbook by targetting fate. it's actually good in discarding-based deck.
Wait, "neither player can activate cards with that name, or their effects, for the rest of this Duel"
Does that mean we can't use the effect of an already face up card on the field?
Example : I target an onslaught on the field, can that already face up onslaught be used to banish my monsters?
Let's say you are against amazoness. Then, when your opponent has more cards than you, you activate this card and target his already face up onslaught. By doing this, your opponent cannot activate another copy of onslaught that he has, but his ALREADY face up onslaught still function like usual (Can still banish monsters, can still SS an amazoness)
So what if the targeted onslaught gets destroyed, removed or banished, does it mean both side can't activate any other more onslaught on current duel.
Or the effects gone together with the absent or targeted onslaught?
There is more: this card works against trap and monsters as well, so it won't become a decoration when fighting decks that don't use spells that much. You don't even need to discard any cards. The only downside is it doesn't negate the first card, but them's the breaks.
I find it hilarious how the dumb Sylvan players are scrambling around trying to find a way to salvage the dead deck, suggesting the use of Card Advance, Amarylease, and now this card as well, unaware that running more spell cards disrupt the deck's flow.
This might just be the ultimate counter card, and could probably even break mirror matches... After all, you can target your own card, and reap its benefit while denying your opponent from ever doing the same. Though targeting your own card won't be too great if you also run 3 copies of the said card. This makes running only 1 copy of a card much rewarding.