Ok 1 feat request coming up. It has a caster requirement of 7th so plenty of time for you to mull it over before you say no........
COMPLETE ARCANE, pg 75.
BLACK LORE OF MOIL [metamagic]
Your study of the sinister knowledge and spellcasting techniques of the long-dead Nightlords of Moil makes your necromany spells especially potent.
Prerequisites: Spell Focus (necromancy), caster level 7th.
Benefit: Any necromancy spell you cast can be cast instead as a Moilian spell, dealing an extra 1d6 points of negative energy damage +1d6 per two spell levels, (+1d6 for 1st level spells, +2d6 for 2nd or 3rd level spells, and so on).
If the spell normally allows a saving throw, the target takes half the negative energy damage on a successful save, regardless of the outcome of the save on the spell's normal effect.
In addition to its spells normal components, a Moilian spell requires the creation and expenditure of a Moilian rune-bone, a small human bone, scribed with carefully prepared arcane markings.
Only a character trained in the Black Lore of Moil knows the secrets of creating a runebone, which takes 1 hour to craft and requires special inks and powders costing 25gp per die of negative energy damage to be generated,
While the maximum negative energy damage dealt by a Moilian spell is based on the spell's level, the actual damage is limited by the runebone. For example, if a sorcerer casts Finger of Death, (a 7th level spell, so normally +4d6), with a 75gp, (3d6), rune-bone, the spell deals only 3d6 points of additional negative energy damage.
A Moilian spell uses a spell slot of the spell's normal level.