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.
Ritual.
Anwendungen (0 Geheimnisse).
Geheimnisse auf Ariadnes Faden können ausgegeben werden, als ob sie sich auf einer beliebigen Vorteilskarte befänden, die ein Ermittler an deinem Ort kontrolliert.
Erschöpfe Ariadnes Faden: Bewege 1 Geheimnis von einer Vorteilskarte, die du kontrollierst, als Ressource in deinen Ressourcenvorrat oder umgekehrt.

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.
ARIADNE'S TWINE
Asset. Arcane
Ritual.
Cost: 3. XP: 1.
Test Icons:
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.