Burtet

Adapted from Pathfinderwiki- Apep

The serpent cult of the deceiver deity Apep is a twin to the cult of the benevolent Wadjet and is part of the ancient cultic system of beliefs that existed in Osirion before they were suppressed by later Keleshite rulers. The sinister, world-circling Apep symbolizes the dangers that lurk beneath the water: whirlpools, crocodiles, and other lethal hazards. He is the boat-crashing rapids, the drowning dark, and the apocalyptic, primordial devourer of the sun, light, and life.
It is believed Apep will eventually devour the sun, creating a night that will never end and effectively bringing about the apocalypse. The rod of the river serpent is a magic item carved in the shape of Apep that grants its bearer the ability to see in the dark and cast hypnotic shadows, and it swallows those it strikes in combat.