[@Noodles] - How mortals worship you is irrelevant to the nature of your domain. What your domain is remains static unless special circumstances apply such as when Iarus approached the twin spirals emerging from the spire and was suffused with divine energy enough to overwhelm his former domain, turning him from the god of trickery to the god of fear.

In order to attain more domains you need more Divine Cords. One domain per Divine Cord.