This creature looks like a thick, bubbling pool of mustard yellow muck or goo.
AC 4, touch 4, flat-footed 4 (-5 Dex, -1 size)
Str 15, Dex 1, Con —, Int —, Wis 1, Cha 8
Any humanoid slain by a vampiric ooze becomes a zombie in 1d4 rounds. Spawn are under the command of the vampiric ooze that created them and remain enslaved until its death. They do not possess any of the abilities they had in life.
Exposing a vampiric ooze to direct sunlight staggers it on the first round, and it is destroyed utterly in the next round if it cannot escape.
Organization solitary or pack (vampiric ooze plus 2-4 zombies)
The vampiric ooze is thought to have been created by a great undead spellcaster using ancient and forbidden magic. Some believe the vampiric ooze was formed when an ochre jelly slew a vampire and absorbed it. It can alter its shape so as to appear up to 12 feet long and 6 inches thick; it can also compress its body to slip through cracks as small as 1 inch wide. It spends its time slithering along floors, walls, and ceilings, or if above ground, hunting its prey at night.
A vampiric ooze attempts to envelop and constrict its prey, dealing negative levels with its slam attack.