This refers to the relatively nice (compared to DnD, anyway) intelligent undead found in DMFA
This derives from the Necropolitan template.
type changes to undead, subtype augmented is added
hit dice change to d12
the subject gains turn resistance +2 and adds +2 to its will defense against control undead
the subject also has unnatural resilience - it heals HP and stat damage as a living creature would,
Heal has no effect on it. It is healed by negative energy
Subject lacks a Con score.
transformation require the subject to die within a week of being infected