One of my dissapointments with second edition is the change to the Sorte abilities. Tugging, destroying, and creating strands was one of the more interesting dramatic options available for Sorte, and I wanted to see it represented. I'm considering adding the following Tessere in place of or in addition to the less thematic Pull:
You may touch and alter the strands of fate for another character. Manipulating strands during an Action Sequence costs a Raise. You can only manipulate a strand if you can see all characters tied to that strand. (For example, two lovers or business partners bound together by Fate would both need to be in your vision to manipulate the strands connecting them.)
Take one or more Lashes to tug on one of another character's strands. You may only tug on a strand of a Rating less than or equal to the number of Lashes you have. You may increase or decrease the Rating of a strand by one. This change is effectively permanent, but may slowly be undone by the natural course of events without further changes. No single strand can be affected by this more than once per session.
Spend a Hero Point and take one or more Lashes to cut an existing or create a new strand. You may only cut a strand of a Rating less than or equal to half of the number of Lashes you have. (So, to cut a Rating 3 strand, you must have six or more Lashes.) This permanently severs this bond of fate permanently, although a new bond may form on its own over time. You may only create a new strand if you have five or more Lashes, and any newly-created strand starts at Rating 1. This is the most risky and fearsome ability available to a Fate Witch - Corruption Points are likely for many uses of this power, and there will likely be wider effects of these changes than she anticipates. A Strega can use this power once per session.
A Note on Strand Ratings
I'd suggest using an abstract Rating of 1-5 for strands to show their relative intensity/importance (as with the Strength 1-10 value in First Edition).
Alternatively, you could use the Rating of either the lowest Trait or most relevant Trait or Skill for the target (half Strength for Villains) for this Rating. A Commerce strand might have a Rating equal to Sailing for a sea captain or merchant, or equal to Weaponry for a bodyguard.
Anyone have any thoughts on additional considerations or things to change to make it more useful at the table or fit better in the existing system?