Requirements

Alignment: Any nongood

Skills: Knowledge (arcana) 8 ranks , Knowledge (religion) 8 ranks

Feats: Spell Focus (necromancy)

Spells: Able to cast summon undead II as a divine spell and command undead as an arcane spell.

Special: Able to rebuke undead.

Special: Access to the Death domain.

Summary

True Necromancers are very constraining to build to as you only have a few options to actually do it. As intended by the developers you need 3 levels in Cleric and 3 levels in Wizard in order to prestige into this and it'll get you right to level 20 and finishing the prestige class. There are other ways to build to this class but it needs very specific feat selection. This does give you access to improvement in arcane and divine spellcasting, making you a sort of necromantic theurge while getting powerful spells along the way. It sort of like Bladesinger as it being designed for characters that are good at both intelligence and wisdom for the most benefit, and charisma for your rebuking. It's cool but can be difficult to play with most characters

Role: Spell Utility

Characteristics: A caster that gains the abilities of the undead

Source: Libris Mortis

Game Rule Information

The True Necromancer has the following game statistics.

Abilities: Whatever your casting stat(s) is/are, Dexterity for combat and Constitution for concentration if you do get hit

Alignment: Any Nongood

Hit Die: d6

Starting Gold: N/A

Class Skills

The True Necromancer's class skills are Concentration (Con), Craft (Int), Heal (Wis), Knowledge (arcana) (Int), Knowledge (religion) (Int), Listen (Wis), Profession (Wis), Search (Int), Spellcraft (Int), Spot (Wis)

Skill Points at 1st Level: (2 + Int modifier) × 4

Skill Points at Each Additional Level: 2 + Int modifier

Class Features

All of the following are class features of the True Necromancer.

Weapon and Armor Proficiency: A True Necromancer is proficient with whatever they were already proficient with.

Spells per Day/Spells Known: A true necromancer gains new spells per day (and spells known, if applicable) as if she had also gained a level in either an arcane spellcasting class she belonged to before adding the prestige class, a divine spellcasting class she belonged to before adding the prestige class, or both, according to the accompanying table. She does not, however, gain any other benefit a character of that class would have gained (metamagic or item creation feats and so on; but see Improved Rebuking and Necromantic Prowess, below). If she had more than one arcane or divine spellcasting class before becoming a true necromancer, she must decide to which class she adds the new level for purposes of determining spells per day and spells known.

Rebuke UndeadSu: True necromancer class levels stack with levels of all other classes that grant the ability to rebuke undead for the purpose of determining the character's effective cleric level for rebuking. For example, a 5th-level cleric/3rd-level sorcerer/2nd-level true necromancer rebukes undead as a 7th-level cleric. The bonus from her necromantic prowess ability, once it is gained, also applies.

Create UndeadSp: On attaining 2nd level, a true necromancer can cast create undead once per day, as the spell of the same name. She can use this ability one additional time per day at 5th level and higher. She must still supply the requisite material components. The true necromancer's caster level equals her character level plus the bonus from her necromantic prowess ability, once it is gained.

Necromantic ProwessEx: At 3rd level, a true necromancer gains unsurpassed power over death. When she rebukes undead, casts a necromancy spell, or uses a spell-like ability that mimics a necromancy spell, her effective caster level increases. The bonus is +1 at 3rd level, +2 at 6th level, +3 at 9th level, and +4 at 12th level and higher.

Zone of DesecrationSu: At 4th level, a true necromancer begins to exert her authority over undead. This aura is identical to the effects of the desecrate spell except that it affects only allied undead.

Major DesecrationSu: At 7th level, a true necromancer extends her authority over undead. The supernatural aura of negative energy surrounding her (see Zone of Desecration, above) now extends to a radius of 10 feet per true necromancer class level.

Create Greater UndeadSp: On reaching 8th level, a true necromancer can cast create greater undead once per day, as the spell. She can use this ability one additional time per day at 11th level and higher. She must still supply the requisite material component. The true necromancer's caster level equals her character level plus the bonus from her necromantic prowess ability.

Horrid WiltingSp: At 10th level and higher, a true necromancer can use horrid wilting once per day, with a caster level equal to her character level plus her bonus from the necromantic prowess ability.

Energy DrainSp: At 13th level and higher, a true necromancer can use energy drain once per day, with a caster level equal to her character level plus her bonus from the necromantic prowess ability.

Wail of the BansheeSp: At 14th level, a true necromancer can use wail of the banshee once per day, with a caster level equal to her character level plus her bonus from the necromantic prowess ability.

Table 1-1: True Necromancer Progression

Level	Base Attack Bonus	Fort Save	Ref Save	Will Save	Special	Spells per day
1st	+0	+0	+0	+2	Rebuke undead	+1 level of existing arcane spellcasting class
2nd	+1	+0	+0	+3	Create undead 1/day	+1 level of existing divine spellcasting class
3rd	+1	+1	+1	+3	Necromantic prowess (+1)	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
4th	+2	+1	+1	+4	Zone of desecration	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
5th	+2	+1	+1	+4	Create undead 2/day	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
6th	+3	+2	+2	+5	Necromantic prowess (+2)	+1 level of existing arcane spellcasting class
7th	+3	+2	+2	+5	Major desecration	+1 level of existing divine spellcasting class
8th	+4	+2	+2	+6	Create greater undead 1/day	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
9th	+4	+3	+3	+6	Necromantic prowess (+3)	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
10th	+5	+3	+3	+7	Horrid wilting	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
11th	+5	+3	+3	+7	Create greater undead 2/day	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
12th	+6	+4	+4	+8	Necromantic prowess (+4)	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
13th	+6	+4	+4	+8	Energy drain	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class
14th	+7	+4	+4	+9	Wail of the banshee	+1 level of existing arcane spellcasting class/ +1 level of existing divine spellcasting class