I've played this card in a couple of decks now, and while it's solid just as a recurring skill boost, it feels like the real powerhouse use is in Short Supply/Scavenging or Short Supply/Yorick decks.

Those decks often have a weird dip in power in the mid-late game, because with a little draw acceleration, you end up reshuffling your deck. This puts your weaknesses back into your card pool and cripples your recurrence. With Persistence however, you can consistently stop yourself from decking out, which lets you sit at your most powerful board state indefinitely.

This combined with Favor of the Moon seems absolutely nuts. You only ever spend 1 offering and can get back a spell guaranteed every time, until you’ve used up all 3 of your Favor tokens.

The interesting thing is the wording here implies that you wouldn’t be putting the curses back into the token pool, you’d put them back into the bag after revealing them with SttD. Then FotM reads “When you would reveal a chaos token from the bag, exhaust [this]: Resolve a token sealed here instead, as if it were just revealed from the chaos bag.”

Since SttD is only “revealing” the curse token and it is not during a skill test, then the curse token does not trigger an additional draw, and goes back into the bag. So, if I’m understanding this right, it goes like this:

Action, Spend 1 offering: Parley. Choose your spell. Reaction, exhaust FotM: Resolve a sealed curse token instead of a random one from the bag. Return the spell to your hand. Put the formerly-sealed curse token into the bag. Gain 1 resource.

With this already out on the table, you can kill any non-Elite enemy in the game with String of Curses and 2 actions and 1 total resource (but you need to have started with 2 resources to make it work.) Play it to auto evade and add the doom, then use Eldritch Tongue to use String of Curses again from your discard pile for the 2nd effect and auto kill it. And you get the 1 resource from the second play back even! Curse them directly into the grave! I'm pretty sure this works since it is not dealing them any damage, just auto defeating them.

Such a weird card that obviously rocks in Finn Edwards.

When to play it? Check if your location has enough clues (better in multiplayer, of course) and a higher shroud value than the enemy's evade value. That's it, you're good to go! Usually with Finn you are a bit better at evading that at investigating, anyway, so Transmogrify lets you gather clues with a higher chance of success and without spending an action.

Combine this with Bait and Switch or Gené Beauregard to milk the attached enemy even further by either moving clues to its location OR bringing it with you as you move to the next location yourself.

Remember, you can't add more curse tokens to the curse bag if it's already full! Go full cursed/blursed, everyone can carry Dawn Star, Mystics can do silly things with Rod of Carnamagos and taboo'ed Ritual Candles, mitigate with Diabolical Luck, and throw around whatever else you want.

Wait... Amanda, what are you doing? Amanda, no.