You agree to set up a deal with the Damdamians basically for free. What follows is lots of letter writing and hearing lots of praise from the somewhat distant Dahnian court.
980 AD, Winter
A heresy sweeps in the southlands of Tven!
It turns out that many of Pantheonists from old Luathbas are clashing heads with the more and more strict Singularists, and the product of it was Acceptant heresy. Preached at first by elderly Singularist priest who converted, Suis of Einvad, within last year the heretical movement had reached almost ten thousand followers in the southern cities.
Acceptant heresy preaches that the Singularist faith had forgotten its roots, and had eschewed the tolerant and open-minded tendencies of many orders and temples of Pantheon, instead steering into totalitarian bent like the xenophobic Cult of Damed. 'Acceptants' are more accepting (hence the name) to those of different faith, different preferences for love, foreigners from different places, as well as happily allow Hurthling and Dwarven worshippers and even acolytes (not that many join, though).
The heresy has reached enough momentum and voice that it threatens stability in the southern cities; that's why the mayors have sent a collective letter to you, asking for guidance and/or support. You decide to...
A) Keep the throne away from fundamentalist skirmishing.
B) Send the Army to quell the heresy before it throws the Duchy into religious war.
C) Proclaim that the heresy is welcome in Tven, just like any faith has been thus far.
D) Send an open letter to the heads of heresy, asking them to preach a bit quieter.