Bhaal is introduced as Lord of Murder, the god of death, a lawful evil lesser god from the plane of Gehenna.
Bhaal strikes unerringly, and his dagger causes the area wounded to wither, he rarely appears to worshippers or others, but is depicted by priests as a bloody, mutilated corpse with a feral face and silent movements. It is said that every murder done strengthens Bhaal. Myrkul is lord of the dead; Bhaal is the lord of death itself, the act of killing. Bhaal is described as one of “The Dark Gods” of evil alignment: "Loviatar, Talona, and Malar serve Bane through Bhaal (although Loviatar and Talona are rivals). Bhaal and Myrkul have an unbreakable, symbiotic alliance." Bhaal is commonly worshipped by assassins of any evil alignment, as well as lawful evil clerics.
One of the Dead Three, Bhaal was originally a mortal, who along with Bane and Myrkul took the portfolios of the ancient deity Jergal. Despite his most common title, Bhaal was the god of Murder, but he especially favoured violent or ritual deaths.
Patron of Assassins, Bhaal was feared throughout Faerûn – especially in the island realm of the Moonshaes. A wholly evil, debased, and sadistic god, Bhaal was served by the goddesses Talona and Loviatar.
He was a Lawful Evil Intermediate Power, and his symbol was a skull encircled by a counterclockwise orbit of drops of blood. His divine Realm was the Throne of Blood.
Despite his power, during the Time of Troubles, when the gods were forced to walk Faerûn, Bhaal was slain by the upstart mortal Cyric using the avatar of Mask (a sword named "Godsbane"), who then stole Bhaal's divinity and portfolio elements.
However, much like Myrkul – who invested his divine essence in the artifact known as the Crown of Horns – Bhaal was not utterly removed from Faerûn. Part of his divinity remains in the Winding Water, around Boarskyr Bridge where he was slain, his blood having flowed into the river. More importantly, Bhaal foresaw his death and impregnated many mortal women – creating his heirs, the Bhaalspawn. The Bhaalspawn were involved in a series of conflicts along the Sword Coast, with one standing above the others.
Of all the dead deities of Abeir-Toril, Bhaal most likely has the most scattered cultists, the worst known as deathstalkers, attempting to bring him back to 'life'.