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Necrotic Ooze

An undead slime creature resembling a sickly mass of sticky, oozing yellow-white puss with pustules of running clear liquid

Basic Fantasy Field Guide Omnibus

Field Guide

Armor Class13
Hit Dice3
Number Appearing1d4, Wild 1d4, Lair 1d4
Attacks1 slam (1d6)
Damage1d6
Movement10'
Save AsFighter: 3
Morale11
XP145
Treasure TypeNone
A Necrotic Ooze is an undead slime creature that resembles nothing more than a sickly mass of sticky, oozing yellow-white puss with pustules of running clear liquid on its exterior. It attacks with a tentacle-like pseudopod.

Special Abilities

Undead: Can be Turned by a Cleric (as a wight), and is immune to sleep, charm, or hold spells. As it is mindless, mind reading is useless. It is likewise immune to disease and poison.
Rotting Disease: The GM should keep track of who is struck by one; after a fight is over, each stricken victim must save vs. Poison; if this save fails, the victim will suffer a rotting disease that deals 1d4 points of damage per day unless cured by cure disease (normal healing has no effect). If slain by the rotting disease, the victim will immediately turn into a necrotic ooze.