The mousefolk in particular are known for their pluck and bravery, and when the call to adventure comes, they tend to answer
Lurker at the Threshold: If your group tends to run short on clue tokens, either due to reckless spending of clue tokens or just larger groups of players, you might want to try the Lurker herald
The gold mewtwo card variants, which appear in certain premium sets and special collector tins, occupy a unique space in the catalog: they are not the rarest by print run, but the gold treatment makes them visually distinctive and consistently appealing to collectors who want the most striking version of the mewtwo card on their shelf or display
This is a very advanced Sorcery strategy because this interaction will allow your opponent to control you on your next turn and will allow you to control them again on their next turn
That being said, with how good this card is, it likely wont be cheap anytime soon
Im not exactly sure about sideboarding against them, or what cards would help