Add a new rule called “Affinity”, within it, add:

Each Tesser has an Affinity (or none), which can be one of the following:
- Water: A Water Tesser cannot make proposals with the word “Water” in it.
- Fire: A Fire Tesser cannot make proposals with the word “Fire” in it.
- Nature: A Nature Tesser cannot make proposals with the word “Nature” in it.

A Tesser’s Affinity is tracked in the GNDT, defaults to “none”, and if a Tesser hasn’t done so in this dynasty, they can change their Affinity from none to a different one.