Korel's Strength of Darkness
(Necromancy)

Range:  0
Components:  V, S, M
Duration:  Permanent
Casting Time:  1 turn
Area of Effect:  Undead touched
Saving Throw:  None

This spell, when cast on an already animated undead, presumedly under the caster's control, strengthens both the body of the undead and the animating force holding it together. The result is an increase in most of the physical statistics of combat, producing an excellent skeletal bodyguard or élite troops.
The effects of this spell depend on the caster's level. Subtract 10 from the level of the caster and divide by two. This modifier (2 at fourteenth level, 3 at sixteenth level, 4 at eighteenth level) is applied in the positive direction to all of the following: THAC0, Hit Dice, Armour Class, and damage modifier. Thus, a 14th-level caster could strengthen a normal skeleton (THAC0 19, 1 HD, AC 7, no damage modifier) to an advanced model with THAC0 17, 3 HD, AC 5, and a +2 damage modifier.
Free-willed undead are not affected by this spell, nor are non-corporeal undead, since the spell strengthens the physical body of the undead. Skeletons, zombies, and ju-ju zombies are the typical recipients of the spell.
The material component for this spell is a pinch of dust from a normal undead of the new Hit Dice or higher (wraith at 5, mummy at 6, etc.) and a cup of blood from a fighter with the same THAC0 as the new level. These are mixed together and splashed on the undead to be affected.

