Canon:Nerull

In the World of Greyhawk campaign setting, as well as in the 3rd Edition core pantheon in D&D, Nerull is the Flan god of death, darkness, murder and the underworld. He is known as the Reaper, the Foe of All Good, the Hater of Life, and the Bringer of Darkness.

Description
Nerull is usually seen as a robed skeleton, carrying a scythe called "Lifecutter". His alignment is Neutral Evil, and his clerics are feared throughout the lands as cold, calculating murderers. Nerull is the patron deity of those who seek the greatest evil for their own enjoyment or gain.

Other aspects
Among the Bakluni, Nerull is known as Tharoth the Reaper. He is viewed in this context as a servant of Istus, in charge of ending mortal lives upon her command.