Belle Marie Cygne ⚜ "Rose"

The dosage isn't the issue; the amount of power generated by how he feels about her would, it seems, be more than enough all by itself. The problem is structure: the spell is set up to accept a very specific thing, and without the two-way connection, there's just no budging it.

There are no books that talk about how to accomplish the kind of delicate surgery that would be needed to change the structure of the curse in the relevant way.