This card. This freaking card. Hey, did you know that its triggered ability isn't a skill check, so symbol tokens revealed for it don't weaken Seal of the Seventh Sign? And that, as a result, while the token is sealed, there's no risk involved in activating it?
Yeah. This card is far more powerful than they probably intended if there's a Mystic on your team. Even without the ability (because relying on that ability without any chaos bag manipulation is ... not a good idea), a 2 cost story asset that doesn't take up any slots for 3 soak is a fairly strong reward. But the moment you add any chaos bag manipulation, even just a Premonition, Grotesque Statue, or Olive McBride to let you use it once for free, you're getting a massive tempo advantage. And if you actually do the Seal of the Seventh Sign combo I alluded to above, you can use it to take care of the last two health of every enemy that shows up forever... or at least until the skill checks being done to advance the investigation break the Seal.
Of course, that does leave the issue of actually finding the dang thing in its side scenario, since, of course, it's a story asset...