There are a lot of Seeker cards that you would gladly forego your auto-resource to add a secret to, and this enables that interaction. I can mostly think of tomes so Daisy will love this, but some of those tomes are powerful enough that any seeker will take them, and this is akin to a third or fourth copy of those cards (or a second copy for the Necronomicon). There's also plenty of non-tome secret cards this benefits as well, making a secret-based deck more viable.
Uses (0 secrets).
Secrets on Ariadne's Twine can be spent as if they were on any asset controlled by an investigator at your location.
Exhaust Ariadne's Twine: Move 1 secret from an asset you control to your resource pool, as a resource, or vice versa.
I think that upgrading this card is one of the valuable way to spend 2xp in arkham horror LCG.
Here is Ariadne's Twine 1xp version.
Cost: 3. XP: 1.