Py'rah's Banishment

Before all, the deities were at peace. Except for Py'rah. He had an ambition and a craving for Death. All of that pressure culminated in the Five Plagues. These would eventually lay the groundwork the Old Terrors.
  Everyone else watched in horror. Thesren would not stand for this injustice. He getherd his allies in Aenar and Exian and together they devised a plan to take the thorn out of their sides. They ambushed him and battled him all they way to the shoreline. On the shoreline, Exian is able to drag Py'rah in and swept him down to the deepest pits of the ocean. Here they will take their victory or go down while trying.
  Aenaer unleashed chains from the soil and strikes at Py'rah. He attempts to drag him down from the Material Plane. Exian increases the pressure and Py'rah blinks. Within that blink, Thesren makes hsi shot. He had summoned his Candidum and places it on its forehead. This would be the final nail in the coffin for Py'rah and he would be banished to the Underworld. A realm for him, his plagues and the sinners.
  Down there, Py'rah now gained the domain of the Dead in addition to his Death domain. Thousands of years later, Py'rah would enact his revenge in the events of [A Near Passing]. Yet Thesren candidum still remains in Py'rah's castle. There it is a both burden and a gift.