Shummrath

Shummrath was an unusual pit fiend in Avernus, first layer of the Nine Hells, in the late 15 century DR.

History
Once Shummrath was a poweful pit fiend until hefailed to show deference to Bel and the archdevil punished him imprisoning the pit fiend inside a canyon of the layer. in time only the mind of Shummrath remained inside a lake of slime but some waters from River Styx spilled inside weakening also Shummrath's mental integrity.

In the, Shummrath reamined with only thirty seconds of memory and repeating always a single thought. However if freed from the Styx Shummrath in 48 hours reformed as pit fiend and tried to have his vengeance against Bel.