Finally, Joe Diamond has all the mythos mitigation he needs to not die to the mythos phase, maybe.
Put this into one of your hand slots, take First Watch and Ariadne's Twine, and every turn you get to mess up the mythos deck in hilarious fashion! Sure, Gloria Goldberg looks on and laughs, but 'not quite as good as someone who is absolutely comically broken' is still pretty good.
Plus when the mythos deck is down to just a few cards left, lets you cut the mythos turn off early, which is nice.