The Princess Who Couldn't Be Saved

Our party rushed to save the princess after she was stolen away, along with her handmaiden, by a group of undead riders. They followed their tracks until they reached the tomb within the dead city of Ianthe. Inside, the found what appeared to be the handmaiden, but turned out to be a simulacrum of her attached to an oblex. The party managed to defeat the oblex before pushing in further. They found and looted a two story library before fighting a mourning spirit in a resting place. They also found a statue of Cintra which they put back into place. They entered the next room to find the princess on a table within a necrotic shield, and the Demilich in charge of this whole situation at the end of the hall. Combat ensued, as a fleshy creature formed from one of the walls. The Demilich used a gravity sinkhole on the party bar the warlock. The monk was downed by this but was quickly healed. The monk and druid went into melee with the Demilich, with the Warlock providing ranged attack, while the Ranger, Rogue and Bard dealt with the necrotic shield. The mound of flesh downed the Rogue, and soon the Demilich casted Hunger of Hadar towards the back of the room. The Rogue melted away in the otherworldly acids. The Ranger and Bard soon were also killed within the Hunger, also attacked by the fleshy monstrosity. The shield was broken down at this stage, unbeknownst to the Demilich, who did not drop the spell in time for the princess to also die within it. The Monk was pushed into the Hunger by a thunderwave, also left to die within it. The Warlock and Druid were all that remained. The Warlock nearly killed the Magus who was also within the shield this whole time casting some sort of Ritual. But the Demilich finished the fight, snuffing out the lives of the Warlock and Druid with a Psychic Blast. The ritual may not have been completed, but the Demilich and his Magus still live to try it again, unlike our heroes who met their end at their hands.