Necropolitan

Necropolitan is an acquired template that can be added to any humanoid or monstrous humanoid (referred to here after as the base creature).
A necropolitan speaks any languages it knew in life, and it has all the base creature's statistics and special abilities except as noted here.

Size and Type
The creature's type changes to undead, and it gains the augmented subtype. Do not recalculate base attack bonus, saves, or skill points. Size is unchanged.

Hit Dice: Increase to d12.

Special Qualities
A necropolitan retains all the special qualities of the base creature and gains those described below.

Resist Control (Ex)
Necropolitans have a +2 profane bonus on their Will saving throws to resist the effect of a control undead spell.

Turn Resistance (Ex)
A necropolitan has +2 turn resistance.

Unnatural Resilience (Ex)
Necropolitans automatically heal hit point damage and ability damage at the same rate as a living creature. The Heal skill has no effect on necropolitans, however negative energy (such as an inflict spell) heals them.

Abilities
Same as the base creature, except that as undead creatures, necropolitans have no Constitution score.

Advancement
By character class.

Level Adjustment
Same as the base creature. (Becoming a necropolitan involves losing a level so the advantages of the undead type cancel out what would other wise be a larger adjustment.)