Which Drachs? *winks*
Myr'drach are beholden to Molvaren. They do, think, behave and believe as they are told.
Most of the cultists would be "faithful" to the dogma that Molvaren professed, as is common to most cults. Individuals that make up the Cult's forces may have at one point or the other had faith in a deity, but as they come from the general population of Layonara and most of the population generally follows a polytheistic pattern of observance (i.e. paying homage to one god or the other depending on the situation).
So no, there is no "Drach god". The faithful cultist believes in the mission of the cult and in Molvaren as a leader.