Personally i think this is one of the best removal from the game because it's not just preventing treachery like most cards does, but it prevent an encounter card completely. Always keep this card in hand to prevent disgusting attachment or side scheme and you're gold.
Hero Interrupt: When an encounter card is revealed from the encounter deck, cancel all of its effects and discard it. Discard cards from the top of the encounter deck equal to the number of boost icons on that card.
Scarlet Witch #6. Scarlet Witch #10.