Morglon'dar#

From the 4e Demonomicon. Potential plot hook for many things as an entry point to the abyss. Never materialised.

Motivation#

Might see demon lords return even despite seeing some die.
Might need last vestige to close portal in

Teadora, Fargrim, Belgos, Lel, and Fist journey through the upper layer of the Abyss
Attempt to enter the Wasting Tower from Pazunia, turned away
Hire a dragon-skeleton ship down the Blood River
Attacked by Demons and Elementals on the trip down the Blood River!
Docking in Morglon-Dar, the span of Ogremoch
Spending time in Morglon-Dar, investigating Shemeshka’s medallion
Entering the base of Khin-Oin, interaction with the Priory of Rot
Journey up through the Wasting Tower
Enter the Library of Souls, find Mercedes’ Soul
Shemeshka and other Raavasta’s are there stealing souls, being attacked by demons of decay
Phraxas, Demon Lord of Decay and master of Khin-Oin, he who sits upon the throne known as Seige Malicious, appears to stop Shemeshka
brief encounter with Phraxas over the Staff of the Lower Planes, Shemeshka escapes, party quick portals out of the tower with Mercedes’ Soul
Each party member ends up in the Deep Astral Sea, must choose between a Black Portal and a White Portal

Demon Lord, Typhon – CC 80 – CR22
Probably too strong for anything.

Tons of good demons in CC. If they follow Vizeran's ideas.

White ticker, thin. Unusually powerful spellcaster, specializes in necromantic magic.
Resides in graveyard / old battlefield. Designates to undead.