Of Netherese origin, the ancient Jathimites despised deities and all aspects of the divine. They believed that, through sheer brute force, mortals could even bring down and kill the gods. Thus, by weaving arcane magic through violent self-destruction—in the actual self-sacrifice of thirty-nine Jathimites—they manifested these forces in physical form, crafting the Jathiman Dagger.
They would not get to savor their creation for long. The god Jergal, Lord of the End of Everything, caused the slaughter of the whole surviving sect in grisly fashion: trapping them in a great coliseum where he slowly imploded and then reanimated them as ghouls who would devour the others, and forcing them to watch each other's fates in horror and hunger. Afterward, he took the Jathiman Dagger for himself.
But, rather than use it, Jergal ultimately let the Jathiman Dagger come into the possession of Bane whilst he was still a mortal. The three adventurers Bane, Bhaal, and Myrkul used the Jathiman Dagger to slay the god-like being Borem, at the Lake of Boiling Mud in Rezamark, and with that act attained a measure of divinity themselves.[note 1]
— The text on the menhir on Mezeketh Isle. 
They left the Jathiman Dagger piercing Borem's Quagheart, which was still slowly beating, in order to prevent the reforming of the Lake of Boiling Mud and the potential return of Borem. They buried the two artifacts in a 3-foot-wide (1 meter) spherical chamber, buried some 35 feet (11 meters) deep on Mezeketh Isle off the coast of Sembia, at a site marked by a certain menhir inscribed in an ancient Jhaamdathan script. There it still lay, unknown to all mortals, by 1372 DR.
- ↑ Although this is undated, the account on page 46 of The Grand History of the Realms places this event after the fall of Netheril in −339 DR and presumably before the destruction of Jhaamdath in −255 DR.
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Eric L. Boyd, Erik Mona (May 2002). Faiths and Pantheons. (Wizards of the Coast), pp. 169, 170. ISBN 0-7869-2759-3.
- ↑ 2.0 2.1 2.2 2.3 Brian R. James and Ed Greenwood (September, 2007). The Grand History of the Realms. (Wizards of the Coast), p. 46. ISBN 978-0-7869-4731-7.