We went through two short adventures in my "Dreams of Erthe" campaign this afternoon. In the first one, "Today is the First Day of the Rest of Your Undeath," the PCs:
- Rose into their undead forms (two necropolitans, a vampire, a mummy, and a death knight)
- Had a necropolitan come running up explaining there was an ooze monster in the Hidden Village, and when the PCs' lich mentor said there was a juju zombie ceremony scheduled, the necropolitan said it wasn't the gravesludge converting the dwarf prisoners (which got the dwarf vampire PC concerned)
- The lich and the PCs entered the Hidden Village, a mock village created back when the first humans ("deathborn") had been created as adults with false memories of having come from "a distant land" and hidden inside permanent hallucinatory terrain spells
- The dwarf vampire cleric flew up, saw the gravesludge ooze approaching the six captive dwarf miners
- The lich and necropolitan wizard entered an inn and spent the adventure exploring the rooms inside, while the PCs found a carnivorous blob inside a tavern one building over
- The mummy cleric/paladin cast a blade barrier spell in the middle of the carnivorous blob, cutting it into two smaller blobs
- The necropolitan elf sorcerer cast a wall of force spell in front of the bound dwarves to try to keep the "back blob" from reaching the dwarves while the other PCs fought the "front blob"
- Eventually killed the front blob after a lot of spell-slinging (and the human death knight spellsword's Abyssal blast), and when the back blob crawled over a rooftop to move around the wall of force, had the elf necropolitan cast a prismatic wall directly in front of the platform in which the dwarves were bound (although one staggered away before that, having severed his bonds but being too weak to aid his fellow dwarves - they were all staggered due to blood loss from the vampires who brought them in)
- Had the vampire dwarf cleric kill the back blob with an implosion spell, but not before it devoured three of the bound dwarves (it plowed through the prismatic wall but was either immune or made its save against all but about half of the electrical damage)
- Watched as the gravesludge "ate" the two remaining bound dwarves (turning them into juju zombies), then fed it the one that escaped after the elf's pseudodragon put him to sleep with its tail venom (they didn't want to give themselves away as secretly trying to stop the secret planet-threatening ploy concocted by the leaders of the Forbidden Lands, and saving the dwarves intended to be turned into juju zombie slaves would have done so)
- Got the apparent explanation from the lich: he'd found a broken magic urn in the inn that had apparently contained the carnivorous blob inside an extradimensional space in stasis, but the necropolitan rogue who stole the urn accidentally released the blob when he snuck off to the Hidden Village to investigate his stolen goods (his body was found in the inn - the blob devours flesh but not bone)