People mostly believe that divinities are born from the collective prayers of humanity, a concrete response to their collective will—that is, prayer comes first, then the gods. Be it the Goddess of Mercy or the Storm God, these are deities created under the cognition of humans.
In contrast to this are the Primordial Gods.
Their appearance may date back to times well before humanity, even before this world existed; they are scattered throughout the universe or maybe dwelling in another plane. Primordial Gods do not need followers to exist, but if they want to influence this world, they must rely on the power of the faithful. Thus, they seduce people to become their worshippers, thereby penetrating the barriers of this world.
So the logic of Primordial Gods is completely reversed, becoming 'gods first, then prayer'—a phenomenon that defies conventional wisdom.