Necromental
A necromental is the undead remnant of an elemental creature. It retains only a fraction of the self-awareness that the elemental had in life, but it becomes twisted and evil.
Creating a Necromental
"Necromental" is an acquired template that can be added to any elemental (referred to hereafter as the base creature). A necromental uses all the base creature's statistics, attacks, and special abilities except as noted here.
Size and Type: The base creature's type changes to undead, and it gains the augmented subtype. It retains any other subtypes as well, except for alignment (such as good) subtypes. Do not recalculate base attack bonus, saves, or skill points. Size is unchanged.
Hit Dice: Drop any Hit Dice from class levels (to a minimum of 1), and raise remaining Hit Dice to d12s.
Armor Class: The base creature's natural armor bonus improves by 2.
Special Attacks: A necromental retains all attacks of the base creature and gains those described below.
Create Spawn (Su): An elemental slain by a necromental's energy drain attack rises as a necromental 1d4 days after death.
Energy Drain (Su): Living creatures hit by a necromental's natural weapon attack gain one negative level. A necromental can use its energy drain ability once per round, regardless of the number of natural weapon attacks the necromental possesses. The save DC to remove the negative level 24 hours later is 10 + 1/2 the necromental's HD. When a necromental bestows a negative level on a victim, it gains 5 temporary hit points (10 on a critical hit). These temporary hit points last for up to 1 hour.
Special Qualities: A necromental retains all the special qualities of the base creature and gains the one described below.
Fast Healing (Ex): A necromental heals 3 points of damage each round as long as it has at least 1 hit point and is within 5 feet of some form of its element (air for necromentals with the air subtype; earth, stone, or metal for necromentals with the earth subtype; flame for necromentals with the fire subtype; or water for necromentals with the water subtype).
Abilities: A necromental has no Constitution score. Its Intelligence changes to 1, its Wisdom changes to 10, and its Charisma changes to 1.
Feats: A necromental gains Great Fortitude as a bonus feat.
Environment: Any, usually same as base creature.
Challenge Rating: Same as the base creature +1.
Alignment: Always neutral evil.
Advancement: Same as base creature (or - if the base creature advances by character class)
Level Adjustment: -
Sample necromental: Earth Necromental, Large.